You literally cannot win.
Ok...it's not a matter of winning with the crazies. Moms should wear whatever they want...like anyone. Moms are sexual beings too...otherwise they wouldn't be moms. There's a lot of movement supporting women in all their roles AND celebrating their sexuality at the same time. I like the idea of ignoring the crazies and women making their own choices. Keep doing that and it will be the social "norm".
Fuck what these bellends think. Mom dress like mom wants to. End of.
Is there a middle ground? Who are the "Goldilocks" who determine: "This mom dress is too hot; this mom dress is too cool; this mom dress is just right?"