Those were not regular sex dolls, they were pedo sex dolls. So it’s not about replacing an hypothetical girlfriend.

Your point still stands though, as an argument could be made that maybe allowing pedophiles to own this type of item could help alleviate the urge to sexually assault actual children. You don’t decide to be a pedophile just like you don’t decide to be heterosexual or gay, but you can decide not to act on your paraphilia and become a pedocriminal, and maybe dolls could help.

This needs to be scientifically assessed, although there’s quite an ethics dilemma about testing that hypothesis.

Are you saying you’re unqualified yourself ??