IIRC about 11% of human persons are left handed. But IMO where a pilot puts his hands is largely irrelevant. I'm somewhat ambidextrous but grew up with my left hand on the N3N/Stearman/etc throttle and right on the stick-wheel unless I was in the left seat of a Piper-Cessna, in which case it still didn't matter.
I was however a bit concerned during my first flight in an F-16 simulator with the throttle on the left and "stick" on the right rather than in the middle. (The stick doesn't move perceptibly, it responds to small pressure inputs) I asked the IP how long it takes to get used to the setup. He said "Oh, about 5 minutes."
He was right.
Sidebar: At least to WW II French aircraft and JAAF (influenced by France) had backwards throttles: "pull to go" instead of "push to go." It made for some interesting evolutions when We flew Their machinery.