In my experience, the best medical care facilities are (or were) attached to the military. When My Pop was in the Navy, I was cared for when needed by Navy doctors, nurses, and staff. All were extremely professional, accurate, and thorough.
When I was 6, and in the first grade, I dislocated my right elbow twice in less than a month. First time I had it reset and put in a cast. Second time was by my idiocy, getting on a swing and swinging as high as I could go. Fell out of the swing, woke up in the hospital. Had a harder cast on the arm with metal to keep it stiff and unable to bend. Had to stay in the hospital for the remainder of the school year, and did my studies there. They had done surgery on my right elbow to clean out the internal bleeding. I had to go each day, twice a day to the soaking room and soak the arm in a vat of medicated hot water. I passed the first grade, even with the absence from school, as I was really thirsty for knowledge.
Now, 59 years later, the right elbow works perfectly, as good as the left. I'm ambidextrous, but because of the complicated injuries, I only write with my left hand. everything else I can do with either or both hands. I chose to be a lefty pitcher when I played Junior League Baseball, as I could pitch a sidearm lefty curve ball that looked like a corkscrew coming at the batter. If it was hit, my spin on it would make it either go foul, or pop up. If popped up either me or the catcher would easily catch it. The season I played, we were undefeated, and none of the opposing teams even made a run off my pitches. Almost all of my games were no hitters for the opposition. A pretty good record, and it got me MVP for the circuit we played in.
But this is actually about my right arm, so things I can do equally well with either arm or hand:
Play guitar, run heavy equipment in a woodshop, shoot baskets, cook, sew, and just about anything that is done using my hands. It has served me well in my work life.
Nowadays, I get arthritic pains in my left arm, but none in my right. I think it's because I favor using the left more, so it gets about 65% of all work I do. Still, I do use the right a lot for many things. Habits form in a short time for sure, as the habit of using the left arm more was instilled in me by the described injuries. I think that is quite understandable.
Incidentally, in the second grade, my teacher would come to my desk and whack the back of my left hand with my wooden ruler, saying that being left handed is evil! I told my mother what that teacher did and said, and she went to the school with me and had a talk with the principal, who called the teacher over the intercom to come to his office. I was present at the meeting, and witnessed the threats my mom made to that teacher. The principal witnessed it too, and agreed with mom. I was transferred to another class that very day. For the rest of that school year, when I saw that teacher and she saw me looking at her, I would stare at her with as stern a look as I could muster, and she would be unable to outstare me. It was a small win for me, but it was enough to make me have more confidence in myself. She most likely learned a lesson herself from that; "How Not to Treat a Young Student".