[Brutha]

I commend you for being able to control your emotions 100% but not everyone can do this. You are lucky

In the end the question is: "It is a good goal to control your emotions?"
I think that I am perfectly able to (when it comes to not feeling them).

But the emotional pain most people feel when you they diagnosed with cancer is their for a reason.
It says to you: "Something is wrong here, you better change it."
It is life, when a major tragedy happens you suffer.
Is is painful, but you learn.
When you want to grow in life, learn from it, feel the pain.

Because the second and last step is simply choosing for yourself what kind of emotions you’ll start feeling. You are the unbeatable master of your own reality!

Know you aren't, you get the cancer and die because you didn't make the changes based on the emotions that the cancer diagnosis provided.

Sure on a day to day basis it can be inefficient to feel angry when you are in a traffic jam.
But in major events like getting cancer the emotional commitment is necessary.

In the last tragic event that effect my emotion I made the conscious choice to let it effect me. I messed up. The emotions lasted for maybe two days?
More time with stronger emotions would have probably lead to more growth, but still you don't get very far in that context with conscious "feeling-emotion-choices".

And yes, you feel good about what you’re reading right now because you internalize that I’m writing this to set you free - not to mock your thought patterns.

You should know better, it is not that easy. You can't make a decision to simply internalize such a concept.
Even when it would be desireable, it takes time to change things that are so deeply rooted in the psyche.
That is similar to saying to an overweight person, you should simply internalize that you are fat and have to get thin.
It is probably even easier for the overweight person, because whether you meet or not is far easier to influence than your emotions.