Yeah, once we've done that we can relax. Now, when our very survival is in question is not a good time to squander our limited resources on decadence.
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Its like, youre starving but instead of going out to hunt you spend all day masturbating. Thats us as a species right now :)
It sounds like in your scenario art is the endgame. What else will we do with our immortal selves once we've reached technological singularity?