Inceldom

[GrandizerII]

Lack of romantic/sexual satisfaction isn't the key here. That's what sex workers are for anyway, and even the technology you mention isn't going to magically resolve loneliness. Chronic loneliness is a product of genetic/predispositional factors as much as (or even moreso) than environmental/circumstantial factors.

People suffer chronic loneliness partly because of personality-related reasons. They may have some insecure attachment style, some personality disorder, and/or score high on the need for validation from others.

For chronic emotional loneliness, that is true.
And legalised sex workers are able to alleviate sexual frustration.

Bur lack of romantic and sexual validation, and the loneliness that comes from that, can only be alleviated through actually having a romantic and sexual relationship.  

And if that canot be obtained through humans then a human facsimile is the best alternative, or indeed a superior option.  It does help the loneliness, as my personal experience can attest.  And the better the technology the better it will be (one day likely supplanting humans as the best romantic option).

If you're referring to your sex doll, I'm not saying it can't help at all with making things feel better temporarily and/or to some extent, but the connection and validation that one normally gets from other people just generally isn't there with impersonal objects. You could satisfy yourself sexually with a doll, or with porn, or with chatbots all day long, but people are still going to feel lonely when they're done orgasming or they've had their romantic fix for the day and are now back to reality. Hell, even while in relationships with other people, there are those who will still feel lonely regardless.

The issue with self-proclaimed incels and the like is that they have pathological issues with loneliness itself. For various reasons (whether societal, familial, predispositional), they have been conditioned to feel like they are not being heard by people around them and that the problem is with these people who are not hearing them, leading to all sorts of negative feelings such as like rage and pathological loneliness. The solution in this case isn't just to provide them with tools to get them sexually/romantically satisfied, but to address the root issues, which will involve having to get them to take accountability for themselves and actually put in the effort to improve their own lives so that they may then be able to have fulfilling relationships with others. Until the root issues get sorted, you're only applying band-aid to the wound. As harsh as this may sound, the problem with incels and the like is primarily themselves, not others. Some might need a lot of support from others to help them work on improving things, but ultimately it comes down to whether they themselves want to make things better for themselves.