No not really. Way back during the days of valve releasing the steam machines and stuff it was made pretty clear to everyone that the intention for SteamOS was just a means of minimizing costs/streamlining design for their systems so that they could compete in the market against game consoles.
SteamOS gives them the ability to avoid the extra cost of Windows for each sale while also allowing them to build a more focused experience for their users that would allow them to minimize costs by exposing the user to fewer possible pitfalls and giving them personal control over things like updates.
It also allows for them to roll out a more streamlined, video game console-like experience that would be more welcoming to a market of users who feel threatened by the prospect of using a computer for gaming.
I’m sure if Microsoft said “sure valve, you guys can put Windows on your machines for free and have unlimited control over every aspect of the system to do whatever you want” Valve would drop SteamOS immediately and everything would be changed but obviously Microsoft couldn’t do that for so many obvious reasons