First of all, very well written article, short and sweet as well as to the point.
I agree with what your saying, but I also would like to add that I don't necessarily like the term "control" in some situations. If a close relative dies for example it is unnatural if you don't experience any "negative" emotions. "Controlling" in that context I would say is the wrong word, rather I would say that "tending" to your emotions would be a better word. Experiencing, allowing your emotions to be and run their course without adding fuel to the flame. Using techniques such as breathwork or meditation as you mention are perfect in that regard.
In a little bit of a rush but I hope you get what I'm trying to convey. That by using "control" as the term you frame your relationship to your emotions in a manner that might not always be beneficial or optimal.
Very good post brother, look forward to more 🙏🏼
RE: A Short Insight on Staying Calm