600 gpu is not mid-tier, it's low tier. I would say yes, 4080 and 7900xtx is high tier and 4090 is enthusiast. Also the gpu is only 1 of the components, you need everything else as well, high end cpu, board, memory, cooling, nvme, case, etc, etc.
So if you're talking a high tier experience, you're definitely talking multiple $1000's. And guess what, that's only lasting you for about 2 years, in 2 years time if you want to remain in the high tier, you have to rebuy most of those components all over again
So yeah, I think my point still stands. If you can afford high end PC gaming, the $400 or $500 for a console that lets you play a bunch of quality exclusives is pretty much peanuts, why wouldn't you have both?