[Zak]

As I see it, the problem is that those companies are effectively monopolies in fields most of us depend on. If Apple or Google refuses service to someone previously reliant on their services, they could be locked out of accounts on a plethora of other services, have their payments to third parties disabled, lose access to major means of communication, and more.

The last generation of big tech monopoly never had that kind of power. Microsoft couldn't even do much to block someone from using its products as most of them were sold through third parties and didn't require network services to operate.