My point is it's not forced on to developers like some platforms do, hint Epic Games Store. Edit: Not true.
I know a plethora of people who support only Steam on principle alone. Not only have they been kind to the Linux community but they've so far held up their end of the bargain when it comes to Steam. Valve's willingness to uphold free speech (while accepting all the downsides like negative brand attention) also means a lot to me.
They used to be awful for customer service but it's really come around lately.