I completely disagree. A rebbi has the same status as a father, both halachicly AND practically, and loves a talmid like a son. He must not abdicate his responsibility to potch the child when necessary.
To do otherwise is destructive to the childs spiritual and emotional well-being.
About ainekelach I would tend to think of in the same status as children, but I would give it more thought before forming a firm opinion on the matter.