Bottom-up meets top-down...
A lot of Christians (as well as those secular people who are opposed to politically correct Leftism) regard colleges as major agents of indoctrination - because they do indeed purposively aim to indoctrinate their students.
But colleges do a terrible - and inefficient and expensive - job at indoctrinating (just as they do at educating).
What the total environment of the modern (mostly residential) college does extremely effectively and efficiently is to corrupt its students.
And corruption (in its various facets) - is (from the point of view of those to sustain the system) the main job of college.
Think about it - from your experience: the typical college leaver is not well indoctrinated, but she has been (very obviously) corrupted.
The expensiveness, and consequent debt, is a feature - not a bug; since it creates dependence on The System which has done, and is doing, the corrupting.
Who exactly are these people who want colleges to be corrupters? Well, there are two groups. The first, at the top, are the demonic powers and those humans who serve them. The second group, at the bottom, are the great mass of people who want to attend college...
To a significant, and often dominant degree, those who wish to attend college, desire to be corrupted: that is, mostly, why they are going.
So there is a top-down with bottom-up collusion and collaboration in corruption. No wonder college does its job so well!
So - one can see why the system of 'higher education' is so robust, so supported, so defended; so large and still expanding!