how in the world was this term even coined
I work with one, used to work with another and I have an additional one in the family and they are definitely not single involuntarily. They're fucking crazy with unrealistically high partner requirements, not a person you'd ever want to spend any intimate time with. The longer a woman is alone, the crazier she gets. Women literally need babies put in her so they don't go off their rocker.
I used to be civil and normal about this, but you can't be normal once you interact with these insane cunts for extended periods of time.
If a person is single after 30, there is a very good reason or, much more often, multiple very good reasons for that. It applies to both men and women.