If someone gave you a robot that worked just like a human would you use it
Possibly, apart from the loving and sex thing. By the time artificial intelligence has reached such a Level as you describe and it's affordable and common place in millions of homes globally , then there will have been plenty of forerunners, of which I guess gadgets like Alexa are just the beginning.
Alexa I guess is Like an early computer or one of those old dial telephones with a lady at rhe exchange putting you through, or a car you wound up.
Artificial intelligence is the way of the future though, and will become more mainstream and more advanced, like phones, computers and television.
In a couple of generations time kids will smile in pity at things like Alexa as it seems so basic,a bit like we do when we look at rhe first computer games on tv, or whatever. Technology moves fast, once they have the basics, then within a generation or two it evolves to something we could only dream of.
I still recall the first TV game, tennis, on a black and white screen you hooked up a huge machine to. Now I watch what can be done on things like PS4 or Xbox and live gaming and it's a million miles more advanced.