having a review board may still yield a net utilitarian outcome compared to not having one
By “net utilitarian outcome” I’m guessing you mean “overall higher utility in the universe”. And I agree, it’s higher than some alternate universes that don’t contain ethics boards. However, it’s probably lower than universes with (competent) utilitarian ethics boards. And the last is probably worse than universes with (competent) utilitarian researchers and no need for ethics boards.
By “net utilitarian outcome” I’m guessing you mean “overall higher utility in the universe”. And I agree, it’s higher than some alternate universes that don’t contain ethics boards. However, it’s probably lower than universes with (competent) utilitarian ethics boards. And the last is probably worse than universes with (competent) utilitarian researchers and no need for ethics boards.
It always depends on what you compare it against.