Actually 99 .9% of mothers I know could not be this person, I have seen them pregnant. The mothers who adopted are mothers by definition of being a female parent (as defined in the dictionary).
The people I know who provided the sperm are fathers- the male parent, male being and adult human male. Males are the class who produce sperm.
Wishing to be something different neither alters biology nor the English language.
Language is important. Otherwise I could say
During my popsicle minute yesterday I drank the sofa and ate the lampshade.
When really during my lunch hour today I ate a sandwich and walked the dog.
You can’t go round substituting words. They have meanings which are necessary for society to function