Ok, I'll go one at a time responding to these questions, but first let me point out that your emotional investment into the argument is making you angry, a clear sign of bias.
1. Again, here is a compilation of states and how they handle the argument -->
http://highschoolsports.cleveland.c...nal-fight-between-public-and-private-schools/
With states like Texas, there is no problem anymore because the private schools just play amongst themselves when it comes to postseason play. I hope the state doesn't go that route because we don't have that many private schools (if you look at state tournament brackets, you'd think 1/3rd of our schools are private, but I digress).
In Missouri, they have a 1.35 multiplier for non-public schools. The private schools were so dominant (33.2% of championships despite making up only 12% of number of schools), that the private schools who were moved up a class were still winning titles at higher classes. Illinois has a 1.65 multiplier, which levels the playing field fairly well, but apparently they also bump schools up because of success, which I don't really agree with.
2. Your example is naming an advantage that one specific public school has over a different private school. That means nothing to me. I'm asking you to name an advantage that public schools have over private schools (systematic advantages).
Example: Private schools have a systematic advantage over public schools, because their player pool is larger due to a much higher majority of their students being available to play high school sports.
3. No, I didn't go to a school anywhere near Xavier. Once again, I have no bias for or against them, or any other private school. I just realize they (as well as other private schools) have a built in advantage of a higher percentage of their students being eligible for sports.
Xavier is, in reality, a 4A basketball school. They have just as many eligible basketball players as a lot of the 4A schools. If they didn't, they wouldn't be playing in a 4A conference. Same goes for Wahlert, Heelan and Assumption. The player pool they are choosing from is a much higher percentage of their enrollment than the public schools that play in the same class.