Sure, but how long are you going to spend reading the syllabus/example questions for some qualification you've never heard of, versus just assuming it's junk like most of the other random qualifications you haven't heard of that people list?
> As for the profs, you can hire them from the same universities. They're allowed to work on the side.
They can, but people will talk. At professor level the people in the same field know each other and reputation is important, especially for the very top level.
> plenty of businesses depend on trust, and it's not like nobody has managed to build trust before.
Bootstrapping an alternative trust basis in an area where one already exists is inherently much harder, because everyone assumes (not unreasonably) that you're probably doing it because the existing system doesn't trust you, probably for good reason.