Kim Kardashian may have helped popularize the exaggerated hourglass figure, but she didn't invent the desire for larger buttocks or cosmetic surgery. There's a difference between influencing a trend and being responsible for other people's choices.
If we're criticizing unrealistic beauty standards, we should also consider social media, the beauty industry, and societal pressures. Kim can be criticized for her influence, but blaming her for thousands of women ruining their bodies ignores the many other factors involved.
Influence doesn't equal sole responsibility.