I had the opposite way teach me what wrestlers are good for: I was focusing on making one dwarf godly strong. I had a Rockmage in full steel plate + mail that had used a megabeast's soul to get up to fighting capability. Unfortunately, I was focusing on him to the point that I hadn't bothered with any other military.
I made the mistake of giving him a maul - turns out that while they're great at crushing, they're not so good at killing. An orc siege came up, and I sent him out to deal with them. The orcs were mounted on spiders. The enemies couldn't get through his armor... but then the spiders started wrestling him and slowly started breaking his elbow, then his knee...
All the armor in the world isn't going to help you when your joints start going the wrong way.
Then I reloaded the game and gave him a halberd instead of a maul. He is terrifying now...
I started training some wrestlers after that. My Duke has a Thing for knuckle dusters anyway, so I might as well get use out of them.