I never understood why people who can use self-hosted wordpress and domain names would decide to give up control and put content on Medium. The stories featured on the front page seem a bit of an ideological bubble (I doubt any conservative bloggers would get any traction there.) And the whole "log in to your email to log on" is IMO horrible design. I put Gmail in a separate browser to mitigate cookie tracking, havin…
That is a bit like saying "I never understood why people who can self-host video put it on YouTube". Most times your content will never reach a significant audience (if this is your goal), platforms like Medium/YouTube/Flickr/500px make discovery easier.
Very little risk.