It feels strange explaining this to a woman, but ....
Most women don't do sport. They do either productive stuff to keep the house/home/life going, or they do stuff that lets them relate to family/friends/other women in general.
In that context some women will play golf or tennis or netball or walk or whatever it is so they can hang with other women and talk about stuff.
Women don't get the thrill of the chase in hunting down that perfect board or or paddle or bike or kite or computer or whatever it is we guys desperately need to be complete.
Besides, SUPs are too big, too heavy and too expensive for anybody sensible to be interested in. The sea is cold and dangerous and full of sharks.
Women like you, who are addicted to SUP, are what we call "good sports", and that is a whole topic on it's own.

Check this for an example: