The revolvers were a Navy thing, not so much an aviator thing. The Army Air Force, which ended up considerably larger than Navy and Marine aviation, never used revolvers; their flying personnel all carried the 1911. So I doubt it was aviation-use specific.
It just so happened that Naval and Marine aviators flying off carriers were the best-known personnel to actually carry the Victory operationally. Generally, sailors didn't need guns and didn't have "standard issue sidearms"; even shipboard officers only drew a handgun if a special duty required it.
Even though the Navy did have 1911s, ever since the first order of 3000 .38 Special M&Ps in early 1941 they ordered a lot more revolvers for general duty, including not just aviation, but shore patrol, naval gun crews in the Atlantic, and base security (the sought-after "Navy Yard Mare Island" marked guns actually identify a duty station).