I agree. I think that we're conditioned at a young age, if not genetically, to be skeptical about the feasibility of long-term hedonism. While the ants were working hard collecting grain, the grasshopper was having fun playing music -- and then the winter came. In our case, I think we're genuinely afraid that while we're wireheading, we'll be caught unaware and unprepared for a real world threat. Even if some subset of the population wire-headed while others 'manned the fort', I wonder if Less Wrong selects for a personality type that would prefer the manning, or if our rates of non-wireheading aren't any higher.

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