Comment by m-p-3

It's kind of unsurprising. As soon as you upload some data into another system that you do not fully control, you can't really expect or trust the other party to discard it because you want to.

Unless there's a good an easy way to store that kind of data and share it with End-to-End encryption (and the server NEVER has access to those keys) so that only authorized users can view the plain data, that problem will remain.