One thing bears further thought IMO: the author mentions the false sense of achievement in games and its addictive nature as an analogy. The issue there is that, at some point the game addict has to look away from the screen: the game may end online service, fall out of fashion, the addicted gamer may lose their quick reflexes as they age, etc. And once they look away, they'll find that they have nothing; they've poured their efforts into something that has left them with no real status in society.
Similarly, people using robotic devices in this way will have poured something rather different into them but the result is still the same; at some point they'll look away and realize they have none of the status markers of society accorded a long-term committed couple / family. In short, the emptiness eventually hits home at some point in both cases. What will these addicts do then? What will become of them? I suspect nothing good, meaning that such robots aren't a long-term solution to the unfulfilled biological needs of those locked out of the reproductive pool.