You're not a "slave". You're extremely well paid with in-demand skills, and you could do something else with them. If you keep doing this, you're no better than the tobacco merchants.
This potentially is another argument for laws / regulation.
Regulation is required in such cases. It's unrealistic to expect otherwise.
> no better than the tobacco merchants
Prior to a certain time, tobacco producers honestly had no idea how harmful their product was. Once they found out, they actively tried to hide that fact from everyone. I don't much like adtech, but unlike tobacco it doesn't cause direct physical harm to the individual. They're also pretty up front about the fact that they try to track you.
I often feel guilty for not being as altuistic as I'd like, but at least I know I'm not using my skills to do something that a net negative for humanity.