There's an obvious difference made between the sexes when it comes to TV make-up; I'm not sure why people are protesting that there isn't. Women as a rule wear a full face of coloured cosmetics including eyeshadows and lip colours, whereas men typically just wear a base.
The word 'choice' is predictably being mentioned quite a lot on this thread. But real choice is a bit subtler than merely someone making open demands as to how females should or shouldn't present their faces. Women may well not have been 'ordered' to pile on the slap - they may well be under an impression that it is purely personal choice or it might even be so. But if there's a culture of it in the workplace - if women become obsolete in front of the cameras unless they keep up the pretence of youth and beauty for as long as possible - and that even their careers are staked on this, then they're going to keep up appearances for as long as possible for the sake of their career. And who can blame them?
Sky were particularly bad for this - we cancelled ages ago so don't know if it was still the same - but their female presenters were done up like painted dolls. The sports presenters had a particularly lean time of it - I well recall the casual sexism so often demonstrated toward Georgie Thomas, for example, as opposed to her male peers. Not least the sexist shit the racing driver Vicki Butler-Henderson took on Top Gear at the hands of the odious Jeremy Clarkson.
As a young receptionist in my first job, I was taken aside by a senior PA and 'spoken to' about not wearing the appropriate office dress (by this she meant heeled shoes) or cosmetics. I had a mile-long walk to work, and didn't want to wear cosmetics. I responded that I was neatly presented and well turned out, that as far as I was aware I was doing my job efficiently unless she had any specific issues she wanted to raise. She didn't, so I responded that since that was so, I'd continue dressing just the way I pleased if it was all the same to her.
This was a difficult stance to make as someone in her late teens who took her professionalism seriously, but it's one I felt it important to make.
So if women are conforming because patriarchy demands it, then there's a clear delineation between the sexes which is broadened all the more because of the still-present pay gap.
TLDR: OP might have a point.