I think the commenter was addressing your initial comment about fanboyism (or more charitably, being fans of) Steam.

People are fans of Steam (of Valve, actually) because Steam has been a boon for the gaming world and for Linux gaming in particular, in a way others (like Epic) haven't. I subscribe to this opinion. I'm just so glad gaming on Linux is mostly seamless now, I simply don't care anymore for which OS a game was built (within reason... but then again, Windows games are not guaranteed to always run on Windows either!).