I presume you are referring to "good moms". While moms go through a lot in raising a family, I would not give that fact as much weight as other skills or experience in the political arena.Moms are not the only people with the ability to multi-task, be diplomatic, stand their ground, and pick theri battles.

There are a lot of great moms out their who do great things...and there are a lot who I wouldn't trust to watch my dog, let alone run a country.

The qualifications are specific to each person, rather than any one group as a whole.