It's not really a trust thing. They are companies, not people. The top decision makers have a fubuciary responsibility to do whatever makes money. They can, and often do, get sued if they don't. So you can expect them to sell you out. It's literally thier purpose for existing.

You can't trust big tech to not collaberate with, big tech either. You don't want them with your information, even if it's not readily apparent how it could hurt you. Before you know it you could be in a fascist dictatorship and wondering how you got there, this is part of the reason. Or would be in that completely hypothetical situation that in no way mirrors our own situation with our dear most intelligent and not al all dickish supreme leader.