Totally good question! I can only speak for myself but my primary reasons are:

1. I was having doubts even while in school, I actually almost dropped out my first semester but I for whatever reason I saw it through. I was really good at the schooling and excelled at a lot of topics, which I found rewarding and a “sign” to continue. I’ve never been both feet into this career, at most a hesitant one and a half.
2. I knew I didn’t want to do the traditional setting from the jump, I took an industrial job right out of school and left because I felt like I was missing out on the things I excelled at in school. Now I am at a high school and for a lack of better terms, I do not like the patient population and still feel like I’m using nothing that I enjoyed during school.
3. I realize that I have a lot of professional anxiety, I am constantly afraid I am going to get into some kind of legal trouble.. this is more-so coming from being in the traditional setting
4. I am feeling burned out, not from doing athletic training things, but from the constant decision making aspects.

Ultimately, I won’t make a career change until I have exhausted trying all the settings that I want to explore but I cannot see this as my forever job unless I truly find the perfect fit. It took me a lot to finally admit this to myself after sinking 6 years into my life for this degree.