They probably don’t, but they have families to feed, so it’s better to follow the guidelines and lie to a bunch of anonymous people on the internet rather than have your wife and kids beating you up after losing your job due to “not being evil enough”
None of these corporations can be trusted at all IMO, simply because they’re corporations in the first place, and WILL always choose what’s better for them rather than what’s better for the community. That’s why I advocate for open source every time I can.
And OK, everything you said is true and valid, but go ahead and try to convice the non-tech people to delete their accounts, while explaining all the little comforts they have will be taken away with it. They’ll simply laugh at you and carry on. That’s how Google and other corporations that follow this “free services” model got so big and influential, and now they’re using their size to do what corporations do: increase profits.
Another problem with this model is you can’t really tell what Google is doing with the data they collect. Can you/anybody tell Google didn’t feed their Bard AI data they collected from you? Can you/anybody tell Google ain’t using your/their data for anything except showing targeted ads? AFAIK, you can’t. Even if they update their ToS regularly, communicate you they’ve changed it and “if you continue using the service it means you agreed with the new Terms of Service”, do you really think people will actually take the time to read the same 20 page ToS every time it changes? Most people I know don’t even read it the first time!
In the end, you may say they’re being as ethical as possible, and the users are simply too lazy and everything bad that happens to them is entirely their own fault. You wouldn’t be wrong at all, but that’s not how the world works.
Also, sorry for the wall of text.
I tested this today with a friend, and apparently it doesn’t need to be a video call, just a regular voice call is enough to do screen share.
I didn’t test with a group call though, so I can’t tell if it only works with two people.