Warped bodies

Why do they look so different from today's bodies. I mean they have no glutes but really large plastic breasts. It doesn't look proportional. Can anyone born in the 70-80s tell me if it was common for really YOUNG girls to have plastic breasts but not focus on building the glutes and instead be extremely skinny.

You would have thought they'd have developed really strong and defined glutes from all that running in the sand and all. But all girls are really scrawny.

If you look at today's girls they focus on both breasts and glutes (and then a ton of other stuff too).

Was the body image so much different?