I believe most of us here are doctors.
You might be better off asking in a thread of allied health professionals rather than in a doctor’s thread cos tbh a doctors job scope is v diff from say a PT or OT, in terms of hours, duties, responsibilities, expectations, etc.

But as a general response, I entered this profession likewise because at the core I wanted to help. N additionally I had the ability, so why not, because can’t lie , being a doctor comes with prestige ,and is well looked upon in society, is a stable career , etc. I would say it’s probably a combination of these two factors tbh for most ppl.
But what keeps us in it is probably a diff matter.
We have a specialised degree, not many ppl would employ a doctor to be a school teacher or baker etc. so just gotta continue on/ pay off our bond / make a living to the best of our abilities.

Speak to other ppl in allied health , go for job attachments, etc to see if it’s really what u want. Many ppl are inspired by their own sad stories in life but it’s a diff thing to have to do it every single day for the rest of ur life. Especially if as allied health ur not gonna get paid exceptionally welll or looked upon extremely highly (not saying it’s not respectable, just being realistic )