You stepped on a slippery slope. If you are against a sport because no one watches it, or supports it financially, or a very small portion of the population supports it, you may want to look in the mirror? Heck, statistically no one in the US competes in Greco Roman...let's dump it from the Olympics? I certainly hope not! As numbers go, freestyle is WAY behind skateboarding, darts and bowling. And when I went to the Olympics in Atlanta I saw sports that I didn't even know were sports!! Handball? Judo? Synchronized swimming?
So how does it start and how is it supported? It starts just like it is now. Girls wrestle boys and people beetch about it. Then a few "girls only" tnmts. start popping up. Then the IHSAA gets enough pressure and suggests that some version of a girls tnmt. be held. In IN that would probably mean a "regional" of all girls from 4 quadrants of the state with the top 4 at each site qualifying for a state championship. VIOLA 2 weekends, and you have girls wrestling.
It ain't perfect and it doesn't happen overnight. Yes the girls that are wrestling now will pound the snot out of the girls that are "trying it" for awhile. Just like kids from the Mater Dei's and Mishawaka's of the world pound the snot out of tiny country bumpkin kids that "try it". And this year, being the first where a girl's state championship, was not without controversy. Case in point, Jennifer Page http://bvwrestling.com/p3717.html. She was a senior who had wrestled Varsity on Bella Vista's team through HS. She was a far better than average wrestler to even make the line-up and usually made at least the semi-finals of every big tnmt. she entered. As a senior, she faced the idea of wrestling in the boys tnmt (where she had zero chance of winning a state championship) or wrestling in the girl's tnmt. The CIF was clear when it started the girl's wrestling tnmt. series. A female wrestler could wrestle in either tnmt. but not both! She decided to wrestle the boy's tnmt. and qualified 2nd in her league, 2nd in her section, and finished 1 match short of qualifying for state (which is much tougher than qualifying for state in IN)
In years to come, very few (if any) will chose to wrestle in the "boy's" tnmt. and I am sure the CIF will eventually not even allow it. But each year the competition for the girls will be tougher and the quality of wrestling better. Think of the first soccer, lacrosse, or rugby teams in IN....they sucked!! But as the sports grow, so does the level of the competition.
Hope this in some way responds to your questions and comments.