Think about it! If you have a lamborghini and none of your neighbors have it, and they regularly wait for buss.
Then you'll be happy but your neighbors will not be happy
It's a human nature to set themself different which is a source of worries for others who do not achieve the same thing
Arguably we will be much happier if everyone has same height, same face, same income, same kind IQ etc...
We can surely research, come up with a best diet then offer balanced deit to everyone free of cost where no one will be desperate to get a job when they feel hungry.
And if this can be done, many will not prefer living in a big city which will make more spaces available to everyone and no one will be forced to go homless.
It's a tradegy that no country is yet able to provide its citizen with free food and housing.