I also have an issue with women referring to other women standing in their pants getting out their tits, knockers, or ass, I really do.
Why? It may not be very refined or polite but if someone is getting their arse or tits out that's what they're doing. I'd say the same about a man getting his arse or willy out.
I think there is maybe an element of using that kind of blunt language to ground what's going on, and bring it down to the nitty gritty of what it is, instead of engaging with the endless wafting on about "empowerment".
I agree the media, as well as advertising and the "influencer" concept, have a lot to do with this being encouraged. There are actually plenty of women, including young women, getting on with their own achievements and agenda whether that's Malala, Greta Thunberg, Adele (AFAIK), Michaela Coel, Kate Tempest (as was) - without waving their bits around on Instagram - but they don't tend to get constant splashes in the Daily Mail.