Doesn't need to, does it? If it's solicited, you know to click on the blurred image. No harm done.

The person I replied to said sending nudes shouldn't be allowed at all

They did not say sending nudes shouldn't be allowed. They send sending unsolicited nudes should not be allowed at all, even if a few people enjoy it.

They aren't saying people can be naked in front of other people, but that flashing people shouldn't be allowed.