I can't think of anything worse than a 'professional' jury. In fact, we chose the random jury of 12 peers, ordinary citizens, to avoid same. They stand between us and tyranny in the court room. Thnink about this one some more, ok?
Please don't assume I have not thought this through simply because we have different opinions; I've thought long and hard about it for over 40 years (starting as a teenager when I began to question why people took for granted the status quo of a two-party system, saying that if it had been around long enough, it meant it could not possibly be improved) .
I know that the idea of a random jury of peers and ordinary citizens was crafted, in theory, to avoid the privileged class ruling against the disadvantaged, or those with personal prejudices and agendas ignoring the rules. When this country was founded that was an important and novel addition to the idea of jurisprudence. Despite that, and in the couple of hundred years since its introduction into our judicial system, we apparently need professional jury consultants to help weed out people who, while they may technically fall into the term "peer", are nevertheless subject to being swayed by either prejudice or ignorance, bribery, or a host of other pitfalls such as simply being subject to the eloquence of a case presented by a better attorney.
Given the numbers of innocent people who are convicted (not ones through evidence problems or tampering), and conversely, the guilty ones who are let go because they could somehow afford better counsel, I don't see that preparing a group of people who have been psychologically tested for the ability to remain objective and have a dependable record of a relative lack of prejudice, and are professionally trained to make decisions based on the evidence and the finer points of what constitutes "reason" and other areas of the law - instead of falling prey to fine oratory or being vulnerable to obfuscation of reason by expensive scientific experts, could do any worse than the system we have now.
If that is somehow deemed more objectionable than the process we have now, I would like to see all jurors go through a period of juror training that is at least as rigorous as the expensive voir dire jury consultant process we currently employ, which I see sometimes as less about choosing a group of "peers" and more about choosing people the defense or prosecution see as being more vulnerable or amenable to their own agendas due to demographic considerations or general value that would favor their own case. In addition, I'd like to see a method of compensation that is equitable; many companies reimburse their employees little or nothing to serve on a jury, which can cause financial hardship to some people who serve on long cases - serving your country as a juror should not be more expensive to some people than to others, or cause actual financial hardship (which is one reason many people go to great lengths to avoid serving jury duty to begin with).
I think the founding fathers of the US were trying to avoid the pitfalls of class, wealth and hierarchy having undue influence on the outcome of court cases, as had often happened during their age in Europe. When this country first started, becoming an attorney wasn't even a process that required a specific education or degree or even passing a test. A lot of things have changed, including the levels of certification and ethics we require on paper for those in the legal world to adhere to.
We live in a world now in which people are largely seen, treated and have learned to behave like consumers, whose citizens increasingly make important decisions, like who they choose to govern their country, much less from doing their own research and thinking and more by what political party has better advertising or marketing techniques, much more by emotion and less by reason in many cases. I just happen to think that many people are subconsciously swayed by the theatrics of courtroom presentation, because we have learned to make many lifestyle decisions based on how advertising and marketing appeal to our emotions - and I feel that preparing a group of people to become better immune to that - just like we supposedly train and certify other legal professionals could not be any worse than the system we have now.
In other words, I believe there are many ways to be "tyrannized", many of which are more subtle and have less accountability or checks and balances potentially built in than one in which citizens of any demographic or background would be chosen for the talent of being able to function as a true jury of "peers" should ,in objectively and professionally reviewing the evidence in a case to determine its outcome. I don't see that happening as often as it should today, despite the intentions of the founding fathers. We all carry out past and prejudices with us but some are either better naturally, or better trained to leave them at the door when making important decisions; and least they could be made professionally accountable if they were unable to execute their duties within those parameters.
I hope we can respectfully disagree and realize you most likely have your own well considered reasons for your own opinion; my point here is please don't assume I have not or lack the ability to have thought this through.