Some small towns might have a stifling, backward local community. Better to let those communities just wallow in their pettiness.
As for judging where people get to live, I understand that sentiment. We certainly don't give governments that power because we love freedom. Laws also exist that try to limit discriminatory practices when people try to find housing. Unfortunately, it is near impossible to regulate how a community will respond to others.
Just something to think about, particularly if one's approaching a new town with only their personal desires in mind.
EDIT: word choice, for clarity.
The poster would be bringing money into the community. They would be paying taxes; if they buy a house, there will probably be property taxes, which typically support local utilities, schools, libraries, etc. They'd be shopping at local stores. The poster asked about schools, so they probably have or will have at least one kid - so purchasing things for at least 3 people. That doesn't sound parasitic to me, it sounds more like investment.
What people are afraid of is not "parasites," it's growth changing the size and character of their community. Which I'm afraid is just the way of things, especially if the area you live in becomes desirable.
And I'd also argue that talking about someone paying taxes to support local services is not "only concerned with money," but whatever makes you feel enlightened, I guess.
On a similar note, many states would like Californians to stay in California and stop trying to Cailifornify everywhere else.