And that's easier on the fediverse than any other social media platform

This seems to be a big misunderstanding, if we're talking votes and participation then you are right, but participating data is but a fraction of the data collected by all other forms of social media. Websites can track:

• Login and usage times
• Ip addresses
• Every single action that is made, clicked, viewed, etc

And with apps they track

• Notification data
• Local network
• User behaviour
• User engagement
• And depending on the given permissions much more

I own my instance, therefore I own the all of the data that could be tracked. Yes my participation is synced with the entire Fediverse, but nothing about my usage and behaviour is.