I don't think there's anything wrong with using Medium, but this is always where decentralization/security/open-protocols utopia seems to die: convenience and the UX. Where everyone seems to be trying to convince you that something like IRC is the best while using Discord because it's better.
Compare a simple article, across the years:
2014: https://web.archive.org/web/20141201191740/https://medium.co...
2019: https://medium.com/@fields/now-its-about-the-things-that-you...
Once they started achieving critical mass, like every other free-to-use webpage, they loaded it full of crap.
Then again, so is using a VPS, just at a different layer
That does not appear to be true of Medium blogs.
(and the percentage of people who even check the latest story for a tag has fallen even further since the last redesign).