The market for private user data should not even exist. So the call for more competition in that area is absurd.

it's not stifling any competition. the data that used to be in the user-agent header is now in the sec-ch-ua header. servers can set response headers to request more information if they want it, assuming the website makes more than one http request, which every website does.

Surveillance capitalism corporations should not even exist at all. They should be illegal.

So it's bad when there's less competition for organized crime?

The privacy preserving ads tech has been around a while and a lot developed outside of Google and Meta. I made a stab at it while an intern at Mozilla, and we basically succeeded at the very easy part of accounting. Training the bandit is a lot harder.

Also the adtech industry in it's current form is harmful to users. First of it exploits tracking vectors. Secondly it's a malware distribution technique second to none.