Pretty easy. Other than a few kids who wrestle all year around at our local (small) schools, most of the other kids already have a bat and glove on (or doing that boring Track and Field "sport"). How many Crown Point or Brownsburg wrestlers compete in 3 sports yearly? Maybe a lot? I honestly don't know. Our wrestlers often don't get in the room until late November because of football.
This is why, IMO, the 1A and 2A schools might have a few "hammers" on the team (all year wrestlers or just extremely athletic), but overall lack the upper tier quality that a 4A school can produce.