You missed the part where they are SUPPOSED to meticulously review the "solution" themselves and have deep foundational understanding of what's going on to know if it's a good solution or not.

Ideas are a dime a dozen. It's not useful when the person lacks the ability to fully vet the solution before passing someone else to review. That just makes them middlemen. When instead the actual maintainer or reviewer could have done the same thing but have that foundational understanding.