Wrestling has always been considered more kid/family friendly (with the exception of ECW and CZW, and look how big they made it),
that has nothing to do with the statement, and it's wrong.
Actually, I would say you are very wrong.
To anyone who does not wrestling and does/or does not watch UFC, wrestling is viewed as something you grow out of when you are a kid.
On top of that, the bulk of people that are into wrestling now, got into it as children.
Not that many people get into wrestling as adults.