i'd think a double action pull on a revolver could be alot for some older people. Maybe after some work it would be lighter but factory?
I think it would have to be looked at on a case-by-case basis.
For example, I showed my 65-year-old mother how to use the same revolver in my pic above for HD. I put snap caps in it and made her dry fire a bunch of times it so she would be more comfortable in knowing how the trigger on that gun felt. She did fine with it, and she's not in the greatest of health. She really liked the idea of that snub as a home defense weapon.