The point is that even a second hand high-end card will cost as much as a PS5. For a single component.

PC gaming has grown a lot, but its peak was the PS3/PS4 era when it could be noticably superior to average people. I'd say it's going back to being a platform for entheusiasts who care about those things you mentioned, which most people don't. At least, not enough to spend twice as much or more for a console equivilent.