That is a valid point and definitely we can acquire a lot of skills. Still there is natural ability and personal preferences and I would think a society where everyone can learn and do what they feel like they are good and and would enjoy - even with that changing over time - would be a way better society.

Now thats of course far from the current discussion, where people are forced to get into certain debts just to study for a profession they hopefully enjoy and will be ok enough in to earn back the money they invested to learn it in the first place.