This new attitude of being outspoken about everyone being "brokies" and his disdain for them actually explains a lot. I don't think their avoidance of professionals is just about wanting to keep everyone isolated. I do think that's part of it, maybe that's why they started and it's certainly a lot to do with why they don't go to school.
But I think in part he genuinely thinks he is above them because he has left the matrix and they are not clever enough to do so. It is why even when they do have to see someone, they have a negative story about them, Chris always knows better and the other person always made a mistake (in his opinion). This seems to apply to anyone from doctors, midwives, teachers, hairdressers, opticians, shop workers, trades people, mechanics. He knows better than them all, they are lowly brokies and are people to be mocked not respected.
The reality is none of their children will be equipped to work at any level of a job.