I think you are right, especially in this area around SWMo. You have seen alot of growth in communities outside of Joplin and Springfield in the last decade just for this reason. In Springfield there is no sense of community if you go to say a Kickapoo or Glendale. But move to a one high school town like Ozark or Nixa and yeah you see that. If you look at Joplin they could have split into two schools, but I remember when they did have two schools it split the sense of belonging because you were not a Joplin eagle, but either a Parkwood Bear or Memorial Eagle, the town was split.
Now you see towns like Log-Rog growing and it is people from Springfield who want their kids to have that small town pride, because Nixa and Ozark might soon have to build new high schools based on their growth. Stafford is growing along with Clever, people want what those towns can offer for their kids yet be close enough to Springfield that they can enjoy what they offer in the way of Jobs, eaters, and entertainment. Joplin people didn't move to Webb because of sports in the beginning while that was a nice trade off, they moved because it was a small community, smaller than Joplin especially back in the late 80's and early 90's. Now you are seeing CJ growing, Carthage is seeing some of that tool.