This is also consistent with most of the states in the upper midwest where the wrestling is the best in the country (PA,OH, IA, Il, WI, IN, MI, NY, MN, WI).
You need to check the team results for Senior Nationals for the past umpteen years. You'll find Kansas fits right in there among those you listed. Typically top 10. We will never be better than some of those based on population alone. Just like we'll never produce more D-1 football recruits than Texas.