I also have a Glock 21, but it needs to be run through it's paces and the wife and needs to be qualified on it.
Ever let non-shooters plink with your autos? Do they ever jam? This is a pretty good reason to think revolver. Basically, they never jam. . .IME.
There's an auto pistol in my nightstand and a revolver in my wife's nightstand. She is very competent with it. My point is that there needn't be one answer for everybody. Each person should make their own decision in terms of which firearm is most appropriate for them, predicated on their individual circumstances, needs and level of skill.