Yeah, many problems to solve here.

But let's take another example: Google going into the space of deep learning based health diagnostics. Why does Google need to have access to our medical data when they can sell their solutions as hardware and software to hospitals? Even if they have to use our data for testing purposes, they could sign an NDA so the use of our data would be severly restricted and they would not own our data.

And for many other services, owning our data should not be the default, and even the necessity of seeing our data should be questioned.