It's funny because any other time you'd be right, except now. The Steam Deck came with no Windows support and they've gradually been offering drivers for Windows (see Linus Tech Tips video about missing video, audio support on Windows).
For once Windows users spent a few days in the shoes of a Linux user.
It's a PC so there's no need for "support" from the manufacturers... at least on windows.
With Linux the manufacturers have to update the drivers. Maybe one day Linux will get a stable driver API?