I've been and iOS developer for a long time. I can tell you from experience that everyone does this. I have never worked for anyone who didn't ask for their app to include some combination of Facebook, Google, Flurry, AppCenter, Segment, Intercom, Parse, or whatever other random analytics framework the PM happens to be infatuated with.
Getting mad at Zoom for using the Facebook SDK is missing the point. They and a million others are always going to be doing this. Get mad at Apple for not letting you wireshark your own iPhone. Or having no way to package open source software where you can actually see what's running. As long as you're running binary blobs that can make whatever network connections they please, people are going to take your data and send it to places you don't know about.
Yeah maybe you can pass laws about it. But is that really a great solution? Who audits that? How do you determine what's legal and what's not? We should be pushing for a platform that makes it obvious what the software you're running is up to. The random pitchfork crusade against whatever company happens to catch a bad news cycle just isn't going to get us anywhere.