Starlink and Tesla will be able to mine a huge amount of data from its users. Not only that, but I also heard that Google Cloud is also partnering with Starlink. Also, Tesla cars are full of cameras and sensors which are probably active 24x7. Not only that, Tesla cars continuously upload and download data. These companies are definitely great in innovation and I really like it but they get access to a lot of data.
I wouldn’t worry about starlink because there are/will be competitors and it will act as another ISP. I don’t think it will be significantly better or worse then existing ISP’s. One thing that could make it worse is that it naturally has a global reach.