Your emotions are just another part of your body that you can control. It's an extremely important part of countless careers such as investment banker, fighter, lawyer, judge, doctor, clinical scientist or researcher, or even things such as an air traffic controller. It's not that the people in these fields do not have emotions, but that they consciously work to control them. I've achieved as much thanks to a career long in my past as well, and it changed me radically for the better.
I think we are quick to discount things that we cannot visibly see. For instance, if somebody of normal health told you that it was just physically impossible for them to bench press more than 100 pounds, you'd probably find their statement quite ridiculous. Of course the reason is that we can see our muscles and how they change and develop (or atrophy) in response to how we train them, and we can precisely measure changes in our ability to lift. With emotions you cannot so easily measure them, and it's not really clear how to train them. But that certainly does not mean it's out of your control.
---
But on point here, consider the notion of trying to prohibit emotionally manipulative advertisements. The first question would be why? Apple's 1984 [1] is one of the most famous and effective bits of marketing. It's also almost entirely an emotional piece. You're certainly not excited about the specs there! I don't see why such things should not be allowed. And if you're going to try to ban emotionally exploitative marketing, why stop there? What of news, or even media in general? Politicians? Even individuals in our ever connected world? And on top of this how do you define what is emotionally exploitative?
It's just not a realistic solution, and sounds quite dystopic in any case. By contrast starting to help people learn to control and manage their emotions is something that seems entirely practical. Of course not everybody will achieve the same results, as in anything, but today we make absolutely 0 effort to teach this in any sort of way. For that matter, at times we even seem to be going in the opposite direction and, at least implicitly, encouraging emotional response.
[1] - https://www.youtube.com/watch?v=2zfqw8nhUwA