[sunshinelackof]

Data ownership doesn't imply agency and control. In the future I own my data, so what? Does every company simply just demand access to all of it so I can use their services?

For data ownership to really matter users/consumers need to be able to bargain on equal terms with companies, probably collectively.

[ghusbands]

The EU certainly wouldn't allow such demands of its citizens - the GDPR non-compliance fines are starting and will hopefully make people stop collecting and holding data they don't need.