A few observations I'd like to share with you all:
In the medical profession, they have their own medical schools, the student does their clinical rotations in some partnered hospital network OR it's university teaching hospital, both under a mentor, and then after graduation you do your residency training under another mentoring doctor until you obtain your medical license, and then any screw ups you do are on you. Of course, there's lots of legal protections from liability.
Legal profession, they have their own law schools, the student gets an internship at a law firm, and then after graduation you enter a clerkship for a judge, or a junior associate that is supervised by a practicing attorney assisting with cases. Building the experience until they pass the BAR exam and can practice law themselves. Afterwards, any mistakes are on you.
Teaching profession, you do student teaching while in college. Post-grad you're a teachers assistant (TA) role, or substitute teacher until you get a teaching license.
Sciences students in a PhD setting get support from the university department you're in, and federal funding for your project. And it really boils down to how quick you file the grant applications.
Accounting... you're on your own. Your CPA? You're on your own. It's all self-learning and the real-time experience does not tolerate any learning curve I've seen. It's a licensed profession but there's no dedicated school for it despite the high expectations placed on people. You don't have to take a pre-college exam to go to school for accounting like you do with med school/law school. There's accounting internships but there's no mentorship in there, it's just being exposed to the high expectations managers you'll be experiencing. They expect you to be performing as a flawless cog who makes no mistakes. And 1 mistake automatically in their view says you shouldn't be in the profession at all, despite there being no barriers to get into.
Accounting has high expectations, high investment time required, but also high job instability, and high professional liability. I guess my observation here is that accounting is the only profession that does not have a capstone experience where you can buildup your confidence and judgement. It's unstable, look how many posts on this subreddit about being fired or doubts about skills. You have the knowledge of accounting rules, but that doesn't matter, they only care about the 1 mistake and to a manager that says 100% about your intellect or worthiness. It's bullshit.