People who cannot grasp the allure of sex dolls or robots don't understand the nature of human beings. The nature of lust. It's perfectly natural to lust after a body. Whether female, male, straight or gay. Heterosexual males lust after well-formed female figures. There's nothing more natural in existence.
Many men are lonely and left out of the market. While men want sex, women operate differently in that they want the best partner they can get. They are generally very selective over who they have sex with. They love sex too of course but they go about it differently to men.
Modern analysis/surveys with dating apps etc. Show that the top 20% of men are being sought by 80% of women. This leaves 80% of men competing for the remaining 20%. Obviously there's crossover and it's not as simplistic as that but the reality is, many men end up alone. Women are far better at forming plutonic relationships and have large circles of friends. Especially in later years, women have that company and support from each other. Men aren't good at doing the same thing. They don't express themselves well and they take the stoic approach as that's what in their nature. To keep quiet and get on with it. Look at boarding houses. They're full of men. You don't see women end up in such places. (Homelessness is a separate issue).
As a consequence, there are huge amounts of lonely men. This option is perfectly legitimate. People who don't understand that, don't understand human beings. They're trying to appease feminists and improve their job prospects and especially their booty prospects. Pathetic. I'd personally rather a doll and uphold my dignity than suck up to women in the hope they'll bestow their carnality like the Fairy Godmother with her Wand.