It wouldn't be surprising if the movie Ex Machina were funded by an industrial consortium seeking to "normalize" replacement of human labor. The movie's propaganda message is: AIs are coming, they'll look so good we'll want to sleep with them, and they'll outsmart us in the short run. Whoa, Nelly! Put down that Koolaid.™
The Uncanny Valley is still an obstacle to robot sex toys. Anything short of perfectly human (too-plastic skin, unusual joint movement, glassy eyes) looks freaky to the non-fetish majority. Ex Machina uses CGI sleight of hand to convince us the male characters are reacting to "hot" (skinny) fashion models. If that failed the film would fall apart in the first half hour.
There's no point in critiquing the movie's other implausibilities. It's film noir, meaning we watch helplessly as the patsy makes one blunder after another in a clockwork mechanism of predestined doom. Elements of the Stepford Wives, Terminator 3, etc.
So we look for other agendas this movie's cranking. Hollywood lifestyle (swanky modern home in picturesque wilderness); adolescent libido (disposable, elfin hotties that keep pushing those male gaze buttons); Silicon Valley as the new Rockefellers (bad guy invents a search engine called "Bluebook" -- note Bluebeard reference -- that 90% of the world uses); sadism as entertainment (women are chopped up but hey they're just robots). Watching it, you are subtly re-programmed to value the things it purports to be critiquing.