The part that I find difficult to get my head around, is not whether someone could have done this. I understand there are some very sick, evil people out there. Thes kinds of people would undoubtedly have no quarms with studying nursing, going to uni, focusing intently on becoming an elite nurse only to intentionally hamr babies.
I am certainly not naive enough to not want to accept that the above scenario is possible.
Where I am having trouble, is believing that this same sick, evil, twisted person would exhibit practically zero psychopathic traits.
Normally when you have a psychopath accused of murder, somehwere along the line, their character reveals something about themsleves that backs up the hypothesis that they could have behaved in the ways being suggested.
With Ms Letby, salsa dancing aside, we have nothing like this.