I definitely don't think something like that should be used to only show one emotion though. If AI were used to control content based on how it makes people feel it should try to balance, not control how we feel. Give us an equal amount of everything.

It's not good to cloak ourselves in only feelgood stories and lies that sound nice and ignore all the bad stuff just because an algorithm wants us to feel nice and cozy. If no one cares about the bad stuff, the bad stuff gets worse.