Gaming is 100 percent not 'on par' I've exclusively used Linux for years now, and consistently run into issues not present on windows.
I have a LARGE diverse library of games I bought when I was gaming on windows.
Literally all of them work fine on my steam deck except a handful of AAA games from companies hostile to linux ("anticheat" bs, they don't want linux gaming to suceed for business reasons), some really ancient DOS games actually work better like Steel Panthers/winspmbt.
I am sorry but especially if you are into indie games even a little, your perspective is no longer indicative for the experience of gaming on linux in general.
The form factor of switch/steam deck is expanding, valve doesn't by any means have a stranglehold over it, they are by far the biggest player but the benefits to linux gaming are shared across the board which opens up the entire industry not closes it down?
Not saying I trust Valve or think they are somehow a company but good but yeah out of the current options I will happily give Valve my money.
Fuck that noise, play video games, they expand and stimulate your mind and you don't hurt anyone or waste any significant amount of resources playing them!