I haven't read through all of the replies but I just want to say that I think that breasts are so "front and centre" that we can dress around and disguise a lot of body issues but that one is hard to hide. Should we all just learn to love ourselves? Probably. But that is easier said then done when there is so much negative feedback about bodies it really can undermine your best efforts to love yourself.
Also, when we look at strangers on the beach, just seeing fake boobs on the beach doesn't tell the full story. I know someone with "I survived breast cancer so I got these great new boobs" breasts, I also know someone who wants to get implants because she had a double mastectomy due to the breast cancer gene and due to complications was not able to have the reconstruction so she now lives with no breasts. I can't imagine what that would do to a young woman.
I think I used to be scornful of women when I saw them with falsies, but who are we to judge? I colour my hair, diet and wear makeup. You could say any of those things have the same effect as fake boobs on teaching our children about the natural process of ageing and body image.