I don’t think that’s the real goal. The real goal is to remove cookies so that compares other than google cannot use them for tracking. Then google uses FLOC as a substitute; they’re the only ones who can use FLOC so it works out great for them.
The cohorts are created automatically by the browser, so that users with similar browsing histories group together. Everyone has equal access to them, through document.interestCohort.
Google (and a small number of other companies, notably Facebook and Amazon) are also able to continue "traditional" profiling due to their extensive first-party traffic / backend integrations.
If FLoC goes as they plan, there will be less tracking overall, but the tracking there is will be considerably more centralized, less technically transparent, and cement incumbent market advantages. (All totally coincidental unfortunate side-effects of Google's concern for your privacy.)
