The problem here is that the majority of users don't actually have informed consent. They don't know what is happening. They think it's just being served ads or something and are like "OK, I can accept the ads in exchange for the service" - what they don't know is FB is passing data to and from data brokers, purchasing your credit card purchases, matching your phone numbers against real life data, then leaking that data to unintended recipients via API or otherwise.

I wouldn't care if I was served isolated display ads, even targetted based on my entered data.