You made a statement that OT and PT have low entry barriers. You partially supported that because there are high pass rates.
That is wrong. And the fact that there is a high pass rate may well have to do with the high entry barrier, resulting in greater capabilities of the candidates and the resultant commitments to succeeding.
Further, the investment in all the schooling is lost without successfully passing the boards, because nothing can be done with the degree without passing the boards.
A person can successfully use an accounting degree even without passing the CPA exams. So the schooling is not a waste and the stress to pass may not be as great.
The degree from college is a degree in accounting, not a degree in Public Accounting. On can be an accountant, and even work in a public accounting firm with having a CPA. A person cannot work as an OT with out having the license.