> With utilitarianism, we attempt to maximize pleasure (very roughly speaking). But part of that is because pleasure has been tied to good events by our built-in wiring. If we have the ability to make any event pleasurable, it feels like we need a new ethical system that employs a full gradient of emotions, including low-valence ones, to appropriately reflect the difference between the desired and the actual reality, and avoid a dystopia where everyone is happy. How does wireheading take this into account

TFA is entirely about addressing this. Wireheading is a common argument against utilitarianism. Furthermore, if everyone is happy, is it a dystopia?

If someone steals my wallet, and it doesn't make me unhappy, then am I really hurt? Money that can't increase my happiness isn't useful