Because better schools benefit everyone. We need to educate the next generation, so they are able to eventually find employment and pay taxes. Or you can look forward to more people on welfare or in prisons (and you won't like paying for that, either!)<quoted text>
For instance, several years ago, the city put up a levy for a vote to build new schools. I don't have any kids in school, why would I vote for new schools?
If these arguments don't persuade you, consider that a main determinant of property values are the quality of the school systems in that area. Would you like to make sure that your home holds its value?