This is the key point. We don't need a perfect fix. We "just" need to change incentives enough that, say, 95% of engineers who work on surveillance and psychological profiling of individuals move on to something else.
The reality may be that there is a decent amount of brain power to go around but I can easily agree that any brain power spent of ads would have been better used if such a money printer were not allowed to exist.
With that, I can see the continued existence of advertising work as something that ultimately removes more value from the economy that it creates.