A lot of “I can control my emotions and choose how I act, you should try that” - yeah stop. We’re human. Emotions are normal.

Ye, that's the point? The point is not to suppress emotions but to recognise them as they're happening to you. It's not even that there's objective value assigned to the emotions, it's simply so that you yourself can perform introspection of the kind "I did that action because I was furious. Now is that good or bad?". But it's still entirely okay to make a conscious decision of the form:

1. I'm gonna punch that motherfucker
2. Okay, stop, I am feeling fury right now, I shouldn't allow just the emotion to guide me. Let's think.
3. Okay, I thought this through, I'm gonna punch that motherfucker with purpose.