From a practical perspective, accepting the papercut is the obvious choice because it's good to be nice to other value systems.

Even if I'm only considering my own values, I give some intrinsic weight to what other people care about. ("NU" is just an approximation of my intrinsic values.) So I'd still accept the papercut.

I also don't really care about mild suffering -- mostly just torture-level suffering. If it were 7 billion really happy people plus 1 person tortured, that would be a much harder dilemma.

In practice, the ratio of expected heaven to expected hell in the future is much smaller than 7 billion to 1, so even if someone is just a "negative-leaning utilitarian" who cares orders of magnitude more about suffering than happiness, s/he'll tend to act like a pure NU on any actual policy question.