I'd never post a the same story across multiple pubs on Medium. Ok. What if I wanted to delete it a year later for another reason? Are you claiming copyright to writer submissions?

If I wanted to delete it from online platforms in order to send it to a magazine, for example. I can't rewrite interviews, for example. Or Medium change their terms and I don't agree.

Deletion after a period should be the author's right unless you are taking copyright. I may not be on Medium forever. Medium may not exist forever.