To take Nigel's point a step further: Kids from my 4a high school have to qualify top 4 at regional, with 16 teams at the regional. 5a and 6a only have 8 teams. You have to be top 25% of your regional in 4a, only top half in 5a.
It is set up as fairly as it can reasonably be set up. I would have to think awfully hard to come up with even a single weight class, where a 5th best kid from a district, was much better than a 6th place kid at state.
