mom12 – “He is telling you the DIN. You choose not to listen”
How do you know that everything in there is the “Din”? As far as I know, he’s not even a poisek. You want to be machmir fine, but don’t make it -if you don’t listen you are doing an Aveira.
I do agree that girls not yet in Shidduchim shouldn’t be wearing nail polish even light colors.