I will say during my last trip we would have been totally cool with an option that let one parent wait in the line while the other entertained the kid elsewhere, then let the family jump on the ride together.
I’m not even sure how mothers with children get to skip the lines would even work.
Childfree people aside, there parks are still mostly made up of families, there’s no feasible way that would function.
I mean, I get the desire, little kids don’t love lines.