Just about all sabotage is self-sabotage.
We don't get forced to eat that cookie, we choose to. And so the diet is ended.
Marketing self-sabotage is fascinating to watch and understand. Consider the college application: it's primarily an opportunity for teenagers who aren't sure of where they want to go to undercut their chances by exposing their uncertainty. The lizard brain, the voice in the back of the head that wants security and safety--it's not eager to go to a college that might be 'too hard' or 'too good'. The easy thing to do is to scale back the effort, not do what works, but do what feels right instead.
Or consider the way we resist opportunities to lead, to connect, to do work that matters. We don't resist because we're not capable of it... we resist because if our marketing fails, if we don't get the job or earn the trust, then we're off the hook. No promises made, which means no promises to keep.
We know more than enough about marketing now. We know how to craft a story that will spread, we know how to find and lead tribes. The thing we have trouble with is making the commitment to do it even when it's frightening and difficult.