I can't speak for the OP, but my own justification for a similar preference rests on something like the consideration you set aside in your first paragraph. Stated more generally: my continued survival consumes resources, and there are things I would prefer those resources be devoted to than maintaining me in a blissful coma.

Sure, when the resources involved are small enough (a cake, a couple of hours of blissful coma, etc.) I may choose otherwise because what the hell, but when the magnitude gets large enough to matter I start to care.

The key question isn't what I could accomplish either way, but what would be accomplished either way.