I don't know, was it? From the beginning everything on Medium seemed to be written by folks who styled themselves as "thought leaders," but clearly weren't
but they messed up their site chasing a business model, and nyt/wapo/etc basically turned into tech companies and fill the niche that medium wanted to. meanwhile substack mints prestige by emphatically not looking like a news site. medium doesn't really have a place on either end of that anymore
If someone uses that in a bio you can just move along, you won't miss anything.