I just don't get why you think that data is yours.
I don't see that data as anyway owned by you, you might have rights to aspects of it, but in no way can you demand ownership over something you don't own.
> I just don't get why you think that data is yours.
Because it is data about me that I'm generating personally, on my own personal equipment. That data is literally nobody else's business unless I choose to share it.
I don't know why you say this, though, when you are arguing that I should be.
> because you are somehow related to the data you get ownership.
In the absence of a compelling reason otherwise, I demand such ownership.