The community is really responsive, such that you could point the hardcore gamer to the forums and they would likely get help getting it fixed.
Professional artists are also an interesting choice. If they are in a major art studio, they are probably having to use custom tooling there already. And Wacom is very well supported on linux.
They aren't necessarily technically skilled, but they are often building the skills. Is literally how a lot of us got into computers. Did we actually understand what himem was? Not at all, but we could play with DOS and friends really well. :D
This is also an odd rabbit hole to fight about. I've had so many windows boxes that couldn't play games throughout the years that I've basically accepted that games programming is hard. :D
Professional artists are also an interesting choice. If they are in a major art studio, they are probably having to use custom tooling there already. And Wacom is very well supported on linux.