I don't see a whole lot of odd-shaped humans shooting pool in general. I chalk it up to if you're not comfortable on the table, you're not gonna ever shoot well, and if you're never shooting well, you'll never play.
I have a buddy whose build like a spaghetti noodle, about 6'5 with arms that could make a T-Rex jealous. He tried shooting pool once or twice, then realized nothing was comfortable about bending down to a pool table with a 58" cue and having to do that for hours. I tried showing him some stances for tall people, but didn't really help him in the short run.
I am 6'3" and am right on the cusp of being uncomfortable. It took a lot of work and determination to find a rock solid stance and stroke that was also comfortable that I could replicate time and time again. At the end of long sessions, my knees shake because my stance requires me to bend way more than the average joe at the knees. The whole locking my back leg and leaning forward thing never ever worked for me.
As much as an advantage being "tall" seems on a pool table, it almost never outweighs how uncomfortable it can be, while being a tall dude. Especially if you have a bad back.