I'm not the person you're asking, but I do think it's important to understand that there's a whole range of ways to hide your origin on the internet. Even under the umbrella of "VPN" there are a lot of pretty different things that the term encompasses. Long before there was ExpressVPN and all these consumer "privacy" VPNs, VPN was used to securely connect networks together. And today, yeah, if sign up through a reputable VPN service based in a Western country, and use that to commit crimes, it's probably not going to go well for you. Another step down the line is a VPN service based in, say, Russia or India. Maybe not impossible to trace, but it's going to be a bit harder. Now, do multiple hops through multiple sketchy providers. A bit harder still. Next, maybe set up your own VPN, hopping through cloud providers (maybe in compromised accounts). Or route your traffic through compromised PCs on residential networks, or a series of rogue proxy servers.
Imagine this scenario. I park somewhere in the parking lot of a mall. I use a high-gain antenna to connect to an open wifi network that some store or restaurant in the mall is running. I proxy through Russia, India, back to a different Russian proxy, and finally exit through a compromised windows computer in some innocent person's house in Michigan. The only thing I do through that proxy is open news station tips forms (NO access to an email account or anything else), and submit a plain text tip through the form. Yeah, this takes some work to do, but you don't have to be a genius. There's a lot of information out there on these things and it's not that buried. This would be quite difficult and time-consuming to track down. And honestly you probably don't need to make it this convoluted to hide effectively.
While it's 1000% true that many people get caught while doing things that they think are untraceable, it's also true that it isn't that hard to make it pretty difficult or potentially impossible for investigators. I know it's comforting to believe that the feds can trace anyone, it's not true. They can trace a lot more than most people think, and most criminals make enough mistakes to get caught, but it's not rocket science to hide.
MOO - I know I am not verified as an expert and I don't really know exactly what the boundaries of the rules are on this, so let's just say this is my opinion and leave it at that.