I don't know about youtubers, but as far as I know SteamOS wasn't meant to be installed on non-deck devices, being distributed only as updates (not sure how those work) and recovery images for reinstalling on your deck, with no support or even instructions for installing it elsewhere.

It's not about SteamOS being stupid, it's about it not even being meant to be an option - it had less support than those "random" other distros.