If someone is swayed by instructions to kill themselves, they are, be definition, consuming content they desire.

That’s a bad argument. Marketing is one thing, manipulation is totally different.

There’s nothing specifically wrong with marketing in general, but marketers with access to enormous amounts of private information blur the line between advertising and manipulation. Using people’s private information to each individual exactly what they want to hear about a candidate without regard to the truth is absolutely something that we should be concerned about.

Perhaps to a perfectly rational being, but I don't happen to know any of those myself.