[You do need to learn Torah. You do need to get through the whole Oral and Written Law. But that is a separate question from yeshiva.]
And this same principle applies to every single person. You can not start at forty what you did not start at 20.
So the very nature of the frum religious world is highly relevant to the discussion of whether to go to yeshiva or to learn a vocation.
Whether it is good or bad or a mixture is important to know since joining almost any yeshiva and being that at the age of twenty will largely determine everything that happens later.
And to back off and try to sound impartial makes no sense since this is not an academic question. Whether people like it or not, what they decide at twenty will determine everything that happens in their life from then on.
My general impression of the religious world is pretty low and I know of no one in the religious world itself that would disagree with me. However there are a few remarkable yeshivas that I think are on the right track an those are the well known Lithuanian kinds of yeshivas based on the path of the Gra.