It's not just a matter of changing your voice. You have to become the creation, to assume the attitude. Otherwise it's just one-dimensional. Smurf-like no matter what. Curiously, Foray said she can't sing in her regular voice, but she can sing as a character.
Animation is a real art form, and occasionally the work is brilliant.
Because the creators are invisible, the gender behind the cartoon doesn't matter. But a lot of cartoons these days aren't fun. A lot of screaming and pushing people around. That seems pretty adolescent boy-like. Although when she started, you could count the number of female animators on one hoof, women do still have one advantage over men - no testosterone.