GoldenWonderwall but no one is "simply " a mother.
SAHM is a huge misnomer- I don't know any SAHMs who do just that, stay at home attend to their children's basic needs and to nothing else.
Almost all SAHMs I know are interacting with others at a community level.
Maybe not running groups and volunteering, but chatting with other parents, having a coffee at the toddler group, allowing their children to explore their own community from a social perspective- meeting other children they may ultimately be going to school with, which makes that transition easier for other children, their parents and the school community.
It may just be chipping in a pound to attend a playgroup at a community hall or signing up to a baby massage class, but even simply attending these community events and giving support is ultimately giving support to others.
Just a listening ear for five minutes makes a world of difference.
And it's this glue that binds communities together.
Being a mother is not simply about navel gazing and looking inwards, it's about looking outwards too.