Aye, I mean how dare they suggest you don't try to force your kids into certain roles but offer them a choice of what they want to play with rather than assuming a girl will like a doll and the colour pink, whilst a boy will prefer blue and a car.
The fact that a lot of the gender stereotypes are relatively new/changable is something that seems to fly over some people's heads

Pink used to be a boy's colour, women were amongst the first computer techs and engineers and arguably individually flew in more aircraft than male pilots*. as just a trio of examples
From a purely personal perspective I find it very amusing that my sister plies my niece with a steady stream of "princes" and "girly" toys and activities, but she actually loves a lot of the "boyish" toys and activities just as much (and her much older brothers love encouraging that, she's as likely to watch a comic book film that is age appropriate as some disney princess one).
*IIRC During WW2 the Women's auxiliary pilots who delivered aircraft had to be familiar with/able to fly more types of aircraft than many of the fighting pilots who tended to fly one aircraft type at a time.