I'm a game programmer, 20 years in the industry shipping dozens of games across the entire history of consoles starting from the PS2/GC era up to and including the consoles of today. Take it from me, the fact that console hardware is fixed ensures the experience of running games designed to push hardware to their functional limits is far more stable/hassle free.
If you don't wanna play games that do that, then this might not be as big of an issue. But the fixed hardware of a console simply cannot be discounted. Valve is not stupid for making a "verified on our console" program. The console platforms spend OODLEs of money ensuring that console games are by and large rock solid. (Counter examples not welcome, I'm just saying in comparison to the arbitrary hardware landscape of the Windows PC install base)
Also console OSes are designed for their main purpose - turn it on, play the game, stop playing the game whenever you like, come back to the game whenever you like. They're optimized towards that experience in a way that a general purpose PC struggles to do (admittedly Steam's big picture mode is pretty good, but you can't totally handwave away the fact that Windows is running in the background)
I'm not against gaming PCs, I have a nice one, it's my main daily game driver. (Also have a PS5, because I'm not only a developer, I'm also a customer!)