I agree on the power of inhibition, but I think the second point you alluded to is the larger one -- the ability to remove the stimulus. Certainly it's hubris

I agree on the power of inhibition, but I think the second point you alluded to is the larger one -- the ability to remove the stimulus. Certainly it's hubris to believe that one can exercise "free will" to remain completely uninfluenced by one's environment. But what we can do is exercise a measure of intelligence and free will to anticipate the relationship between stimulus and response, and alter our environment accordingly. I.e. if you're trying to lose weight, don't allow yourself to be exposed to fast food advertising. Our brains may be heavily influenced by our environment in ways that we are not normally aware, but the existence of studies like these shows that we can begin to understand the dynamic of influence. Once we have understanding we can take appropriate measures. As I see it, that's the true power of intelligence and human agency. After all, as you point out, animals also have certain powers of inhibition. But none have the ability to comprehend their own minds and alter their environment accordingly.