Earlier quoted context omitted.
Sure, I don't advocate FLoC itself (because I don't want to be uniquely identified through fingerprinting) but I'm not sure I understand why particular FLoC cohorts actual meaning being discovered is considered bad. I actually feel like I want that to happen so I could probably tweak my cohort consciously.
Besides the privacy implications, do you really want to only be served content that you have shown a previous interest in? Eventually this will lead to you living in an internet bubble that only ever shows you the same things. Would you be happy with that?
We are already living in such bubbles by the way. At least people who consciously choose their bubbles probably tend to be more aware of that.