Why do people diss breast implants?

Why does it seem like so many people disrespect women with breast implants?

It's there body and they wanted to fix something that upset them.

I'm not talking about those women who went so big they had to invent a whole new bra size for them.

I mean the ones who got a new size that fits to their body. Why should they act like they didn't pay for them? I don't understand why it's so "shameful". :/