Getting obese seems like the opposite of excessive grooming. Most of the tendencies you're talking about are not happening in the overpopulated areas. The selfie thing is hugely overblown, a lot of people may be self-absorbed, but what says that's new, and a lot of people are also depressed.
The mice thing is not a utopia, it's an extremely artificial situation that only fits a very banal and shallow definition of "utopia". And that is not and probably never will be a situation humans will find themselves in since it requires a third party to engineer. None of us right now are in a closed environment, and we're definitely not in a no scarcity situation, since people are still worried about holding a job. The NEET thing is, too, related to the whole job thing.
The mice thing is not a utopia, it's an extremely artificial situation that only fits a very banal and shallow definition of "utopia". And that is not and probably never will be a situation humans will find themselves in since it requires a third party to engineer. None of us right now are in a closed environment, and we're definitely not in a no scarcity situation, since people are still worried about holding a job. The NEET thing is, too, related to the whole job thing.
In what way are these situations at all related?