Yeah but I
dont want to be found. That's why I don't share my email. If I want to share with someone, I don't want the use that app to establish a link between us, because I don't want the app to know anything about us except what it must to do it's job.
"Go find some setting and figure it out" is a UX fail. When I share eg a Dropbox link or a Google Photos link, you can get to it whether you have an established account or not. If there's something special about an app that requires an account before interaction is possible, then you can still make it a one-time share.
Yes, it does make user support more complicated. Yes, that's what I want and expect. I hope when I come asking for help, you can't help me because you have no clue who I am and have no way to get in touch with me because I used some email obscuring service. That's on me.