Even loving women sometimes have imperfections, such as being jealous of other loving women, or angry when I decide to ignore them and play computer games instead. Sexbots, in theory, could be perfect.

I don't like you using words like "imperfections" or "perfect" because the reality of interpersonal relationships is more complicated than that. EY talked about this issue in his post Interpersonal Entanglement. I don't think isolated cases of imperfections are intrinsically meaningful, I mean maybe being jealous is not that important to preserve, I'm not sure about that, but the underlying reality behind those cases of imperfections is pretty damn important to me - that there's a sentient thinking being behind all that imperfection.

In a nutshell—sex/romance, as we know it now, is a primary dimension of multiplayer fun. If you take that fun and redirect it to something that isn't socially entangled, if you turn sex into an exclusively single-player game, then you've just made life that much simpler—in the same way that eliminating boredom or sympathy or values over nonsubjective reality or individuals wanting to navigate their own futures, would tend to make life "simpler". When I consider how easily human existence could collapse into sterile simplicity, if just a single major value were eliminated, I get very protective of the complexity of human existence.

I think the most important aspect of romance is that thing EY was talking about: that it's social, that there are real human beings interacting with each other which makes it unpredictable, and complicated sometimes, but that's part of the fun. The pure hedonistic gratification of sexual acts is important too, but not as important as the former, otherwise I'd be fine with porn and fapping for all eternity. I think you post implies that you think there's something different that is important, what is that thing?