One of the motivation behind NIMBY is to maintain high property values and most of all keep out multi family housing in order to price out the lower classes. This results in huge differences in k-12 educational quality and thus opportunity, due to school zoning.
You're mischaracterizing typical NIMBY motivations. When I talk to those people they are mostly long term residents who are more concerned with quality of life issues like noise and traffic. They don't care as much about property values because they aren't planning to sell; they expect to die in their current homes. And they oppose new development even in cases where it would increase their own property values.