You learned it OF YOUR OWN CHOICE.
Just to clarify, this isn't entirely true. I did not actually feel as though I had a choice, to a very large degree. I absolutely could not ignore it within me and it would have been massively unhealthy to try to do so, and I would not have had a choice about that, I promise you (because I already know what that was/is like). As it turns out, I was simultaneously called to think about everything I was doing at the instrument, once I dawned upon a time of treating it like a craft in University, and it was specifically for the sake of helping others.
If you are lucky enough also be in a position to earn off that, you should be pleased.
I actually went into music and teaching for very deep reasons, and felt undeniably called to it/them. And, it wasn't about trying to spend my life indulged in the sound of the piano and treating it like a buffet that I spend my life gorging myself upon, just for the sake of gorging myself, and while getting paid to do it. It has always been about wanting to share it with others, and ultimately to truly help others. What is difficult for me is to know that I actually do have specialized knowledge that is barely ever used by anybody but myself. There are gigantic numbers of people who need not ever have dragged their piano into the freezing garage at 3am in the morning, rebuilding technique, draining their bank accounts, who could basically just breeze into my teaching room from under a bridge and help somebody who is only going to play the piano for 3 months to play Jingle Bells with one hand.
I want to be able to help people on a deeper level and with more specialized knowledge, and I want to learn more, directly because I would like to be able to help people that much more, too. That is my fundamental desire, not to just get paid whilst gorging myself at the piano buffet.
Ultimately, I want(ed) to help people through anything I do musically, whether it be teaching, writing, composing, performing, improvising. And, ultimately, I want to help people even more than I want to be a musician, I just happen(ed) to believe that music was/is one of the highest forms of vitality that there is, so my logic was that if I really want to help people as much as possible, it would seem a natural part of that to have it be through the highest form possible (I'm sure logic about these things varies per person).
Where I currently stand with it is that, if I am never going to be able to seriously help people and if I am forever going to have to keep the deeper parts of musicianship on the outskirts of my life and my personal being, then I may be of more help to people if I am doing something that is ultimately more accessible to everybody involved, but doesn't have the pressure of being as meaningful as what I thought music could be.
PS- As I'm positive you can actually grasp, this:
There are problems with being a musical person from the get go and not having the right outlets, just as there are problems with being a musical professional and not having the right outlets.
Is not about pity(ing me), but is meant for individuals who may feel they could have somehow escaped a dreadful situation by having never stepped foot on a musical path. A musical person can't escape needing to be musical, and if a person can understand what it feels like to be a musical adult without the right outlets to be musical, then one can comprehend that the need to be musical would have still been present in childhood, even if you didn't recognize it as such. And it would have been just as problematic -if not more than- to not have it, as a path that included music in childhood for the sake of developing a career that didn't necessarily turn out as intended.