Blade Rinner. Parasite Dolls. Bubblegum Crisis/AD Police. Lots of sci-fi has sexbots. Thats why they are being created. People that saw that future wanted it enough to create it.
The Tricorder, the Communicator and even transparent aluminium were the direct result of Star Trek.
The Rail gun and lazers.
Humans imagine and then creat what they imagine. For good and bad.