This rant is 100% correct. We do all (backups, raid expanses, clouds and sync) just to keep our data safe. If a software would remove my own data, from my own device and it would not be some “alpha” app not prepared to be productive, I would be more than pissed. And banning for fair questions is getting more common (I’m looking at you PhotoPrism developers), to the level that fair developers should be praised for their help and work.

I was on the same boat, unfortunately if the selective sync is a must (for me it was), you will not find anything better than resilio pro for ios devices.
Working like a charm for 2 years for me and my family.