Because men are meant to look strong and Alpha. Women like men to be 6ft or over and have muscles because to them it looks like your a provider and protector it all stems from the caveman days.
But all these Alpha women lately is just baffling. It all started with women doing weighted squats to get a fat bum like the stupid Kardashian’s but now it’s gone overload. In the last year I would honestly say the gyms I’ve been to that used to be say 80% men are now nearly 50/50 there is just as many women swaggering around the weights part with skin tight leggings begging for attention and taking egotistical selfies after every set of weights it’s vulgar.
They don’t realise doing all these leg exercises for there bum is just giving them massive fat legs that will be covered in stretch marks. I don’t get why any woman would want muscular shoulders or arms
It's no more vulgar when a woman does it than when a man does it (the selfie thing is just current fashion). It also serves pretty much the same purpose nowadays, since we no longer have to fight dangerous animals for territory or food. The distinction you're talking about was relevant in hunter-gatherer societies before farming became widespread, but not today unless you're in one of the very few surviving hunter-gatherer cultures.
Your position on what people find attractive is hugely oversimplified and treats a trend as an absolute, so it's wrong in that way. It's also wrong in that it's based on the assumption that the main or only purpose of weight training is to attract other people. The main purpose is for yourself, not for other people. To such an extent that it can easily become downright narcissistic.
When I was training (and I will start again), I wasn't thinking "other people will like my musculature". I was thinking "I like my musculature". Bugger other people - it's my view of me that matters. It wasn't just about how I looked to myself, though that was part of it. I changed my appearance quite radically and I gained a liking for mirrors. If I was more modern in my fashions, I would have been taking selfies. But the main thing was how I felt. Not just more likely to be happy and more alert, although both those things were true. It was the enjoyment of using my muscles and feeling them work and move.
There's a video online in which two media people spend 5 weeks training with a personal trainer who specialises in training actors to physically fit a role. You can do a lot in 5 weeks if you're devoting the entire time to training. All of it - what you eat, when you sleep, training every day as your full time job. The most relevant bit is what one of them said in response to the increased musculature in her back and shoulders - she described it as "cool" and talked about it in terms of what she saw and felt. Nothing to do with anyone else, because it isn't.
I won't embed the video it case the whole thread get moved to the video thread and thus ruined, but here's a link to it:
