I agree with WTP. I think it’s healthy for kids to dream. There is nothing wrong with wanting to do everything, and there is nothing inherently wrong with most of the professions listed here.
The main problem is that they may not be compatible with being a serious Talmid Chacham or the kind of eishes chayil that many Frum people are hoping their kids will be.
But the kids themselves will realize that when they grow up. At some point they will figure out that it’s impossible to both sit and learn all day and be a truck driver. And if you brought them up with certain values, chances are they will choose learning all day. Unless they really are not capable of it, in which case it’s good they have something else to fall back on it.
A girl wanting to be a Rabbi is different, since there are halachic problems with that. Instead of emphasizing what she can’t do, try to figure out why she wants to be a Rabbi, and help to find ways she CAN do those things in a kosher way. It is possible.