Someone may benefit a lot from a person that isn’t necessarily famous. There are many mashaayikh out there that are not known except by a few but they may be even more knowledgeable than the famous ones! Fame is a trial Allah tests whom He wants with.
Just because someone has gone to an Islamic university doesn’t mean anything. Sheikh Ibn Uthaymeen (rh) didn’t go to one! In fact, in his teacher’s times, there weren’t even any Islamic universities and Islamic degrees to speak of.