There's definitely evidence that meditation alters your brain in positive ways [1]. The phrase "impulse control" isn't used in the list of benefits, but they list improvements in traits I'd associate with impulse control, e.g. increased self-awareness and reduced anxiety.
I don't think anyone is arguing that physically exercising wouldn't provide some of the same mental benefits of meditation. I for one think that it would. (Especially the act of forcing oneself to go to the gym, rather than just having fun playing basketball with friends--even if the exercise content is the same).
But in your original post you are doubting that meditation has these benefits at all. I think that is what most people are arguing against.
> But in your original post you are doubting that meditation has these benefits at all.
I am arguing there is no basis for the claims of specific benefits. I never disputed that meditation clearly does something. It's just not clear that something is at all meaningful, or lines up with the article's motivations.
[1] http://www.familyhealthguide.co.uk/mindfulness-meditation-le...