What I used to hate about WT "advice" was the blanket statements - assuming that everyone is the same. Such a case is here in that WT:
"All things are lawful [or, “permissible,” ftn.], but not
all things are advantageous. All things are lawful, but not all things
In quoting this it puts a negative light on higher education. How do they know what is advantageous to the individual? How do they know what effect this will have on them even spiritually? Take for example the youth who is intelligent enough to not feel that this higher learning is anything out of the ordinary, or more specifically, will be driven quite mad if they don't use their brain to its full capacity! What effect will that have on them?
> Low self worth
> Struggling to make ends meet with the "middle class squeeze"
The list goes on. It's not just about the education per ce, it's about the faulty mindset it instils in youth:
"Don't bother even trying because unless you're putting the WT first you'll fail in life".
Thus, the person's desire for doing well for themselves (putting their back into any endeavour) is severely suppressed, and so is their general feedback/well-being due to not being who they can be. They don't reach their potential, which as many belief, was given by God in the first place.
Are any of these traits advantageous in the kingdom of God? Of course not. You become MORE focussed on yourself and your own inadequacies (self centred), or the stresses of life because you're only getting back what you put in (i.e. a token amount because it's "Satan's system"). So even in a religious sense, it holds the membership back.