What often strikes me about that setup is how it usually acts as a blunt critique of the protagonist's previous life. It's not just a random power-up; the system forces a level of engagement with a structured social world the character has spent years avoiding. They have to interpret stats, follow quest prompts, and get penalized for ignoring social cues—things that, for a NEET, are the absolute antithesis of their comfort zone.
I've seen it used for genuine growth in some Korean webnovels, where the system is almost like a ruthless therapist. The 'affection points' or 'route flags' become a quantifiable language for something the protagonist fundamentally doesn't understand. The drama comes from them learning to see people as more than their stats, often failing spectacularly along the way. The system provides a crutch that eventually has to be discarded for real connection, which is a much more interesting arc than just winning the game.
In trashier wish-fulfillment stories, though, it's the opposite. The system just automates and gamifies social success, reducing romance to a series of correct dialogue choices that guarantee a harem. That version honestly feels kind of sad, reinforcing the NEET's original worldview that social interaction is just a puzzle with a solution.