Your view is an oversimplified conception that ALL Poly & JC
students are like that, in other words, stereotyping them. Not
every student don't know life outside school or too immature to
realise the real world after ns and adulthood is not easy as
pie.
I think what your trying to say is that the poly & jc doesn't
equip you with life skills to prepare you for an adult working
life, correct? Either way, can't be helped if there are no
institution that would teach better than in an office or a real
working environment. But i believe that what you learnt in poly/jc
is only to build a rough foundation and qualification before any
real life experiences can be gained in future.