The point is most girls just aim to be a certain weight and do this by calorie counting or cutting calories. Yes this will get you to your desired weight, but it won't get you to your desired look. To get your desired look you need to exercise and probably do weights.
Lads are different, they don't really have weight goals. their goals are normally to get a 6 pack(so be lean) and then have muscles...this means they eat well to get lean and workout well to get muscles, so they look good.
But saying that the bar is set so high for lads it is much more hard work and the bar is so low for women because pretty much all women fail with diet and exercise.
I mean something like this, would be seen as a massive achievement for a female.
The male equivalent for time and effort would be laughed at and be called small, weak and pathetic. (srs)...That's not even taking into account that a lot of blokes also take steroids, making what is seen as a good physique even more tough for lads that are natural.
Females have it so easy when it comes to getting a good looking body, apart from your not in control of your tits, but if I had crap ones I would just have a tit job.