I disagree: boundaries and disciplines are constructed and compounded by jargon and various bells and whistles more than by any actual unfathomable "content." At the same time, any art/science at any period in human history required substantial time/energy to master.
Can we have another Aristotle or Hegel? It all depends on the amount of bullshit such an intellectual would be able to recognize and eliminate. Marx did ok. Cassirer did OK. Wittgenstein did OK.
Boundaries and disciplines, so far as I can see, are partly there to keep a potentially revolutionary class (the intelligensia) divided and powerless: divided from the working class and divided from one another. The utter waste of "specialization" was glaringly obvious to me in academia and it is glaringly obvious now in the private sector as well.
Joanna