Isms are privilege plus power. This is why people who talk about "reverse racism" and "reverse sexism" are usually talking out of their bottoms.
Ah yes, that old chestnut. So TV ads proclaiming 'So simple even a man can do it' are just friendly banter are they? TV ads depicting men as hopeless and unable to deal with a cold are just 'friendly banter' too I suppose? When if the same ads were aired saying the same about women there would be an almighty stink created by feminists.
Humour arises from the unexpected. Therefore it is supposedly funny to have an advert saying something is so simple even a man can do it - because in real life, men do the difficult things (running the country, being high court judges, fixing technical things). Funny. Lol. (Well, no, but you get the idea.)
If women are portrayed as stupid, that is not unexpected, because cultural meme has it that women are a bit weak, simple minded, etc. So there is no humour.
I dislike the ads very much, because they draw on unpleasant gender stereotypes, but to suggest that they are reverse sexism is bottomgravy.
Would you now like to do "why it is that we don't have a White Police Association, surely that's reverse racism?" followed by "But What About the Able-Bodied Direct Action Network"?