Look, I'm in Brisbane. You ever want to spar, my door is open, metaphorically. This is not an ego thing, I am literally offering to work with you, I'm offering you the chance to see why my training methodology will do exactly what you want and more. You'll get all those things you crave PLUS you'll learn how to fight. It's actually a really good deal.
I want to be clear, I don't want to "fight" you, nor do I want to "beat you up". I want to help you find what works in the techniques you've learned. There will be no malice, I spar every Friday with my mates and afterwards chill out with them, there's no ego. There can't be, most of my mates are significantly better than me, lol.
Well, my point was you were wrong about this not happening in another area of the website.
I'd say used-to-wrestle-in-highschool guy is way more effective than untrained tough guy in a fight, and karateka are sometimes about on par with untrained people when it comes to moving on the ground, unless they've done some crosstraining or crappling, if early style vs style is any indication.
Old NHB fights had karateka/taekwondo guys and/or untrained toughmen frantically bicycling their legs from under mount, try to bench press the other guy off him, hold onto crappy headlocks like its a real attack, or try to kick or knee the guy from underneath while the opponent sits in mount or sidemount. These are the sorts of shenanigans that someone who even used to be a good wrestler would scoff at and easily defeat.
I've competed against a number of types of martial artists, and plain old wrestlers have given me the most trouble. I'd say that it takes a good karateka to stop a decent wrestler.
Of course, there's always the chance that the former wrestler gets KTFO'd on the way in with his rusty old takedown and lack of striking background.