Some people don't go to ivy league or top 10 law schools because they simply can't afford it.
The truth is that the education you get at a top law school is that much better than what you get at a lesser school. Law schools really are considered more evaluative than educational by Firms. If you see someone got into Yale, that confirms to you they have brainpower and ability. Sort of the stamp of approval. The value is the name and screening process to get into the school -- not the education you get once inside.
If someone chooses to apply to a "lesser" school, that does not mean that they lack the qualifications to go to a top school. Miers went to a Texas school. Perhaps she wanted to be close to her family, or a boyfriend, or it was simply cheaper. That's the way it works sometimes in the real world.
But I'll address your comment. Many law students discover that they would be much better off NOT going to a big name school. All that counts in the hiring of graduates is class ranking and law review. IOW--ninety percent of the student body exists to support the upper ten percent. Law firms ignore the rest of the grads. This is true even in "lesser" law schools. Therefore, you've got a better shot at a better job if you choose a law school not so highly ranked where you have a better shot at being in the top ten.
It'd be amusing to see the lower ninety just drop out of school once they know they're not going to be in the top ten. That'd show the law school faculty...
I'd like to see our law schools cut down to ten percent capacity, anyway. Who needs all these lawyers? It's a pestilence!!
all pass the same bar exam.