You guys saying "this is upper Midgar" need to replay through that intro again. Even upper Midgar has its share of poverty and litter. Abandoned turned over cars, trash on the street.
You simply don't know what you are talking about. I've played this game like literally tens of times and you are just making false statements.
We never even explored Upper Midgar in the game. At all. Never.
The only parts we see of Upper Midgar is basically what is around immediately around after the explosion of the Reactor, and when you run out into the European style streets before jumping on the train.
The only other times are like seeing when the Plate falls on Sector 7 you get a brief look at the Upper Plate before it falls and when you invade the Shinra building when you pretty much ONLY explore the Shinra building.
The other time is when you parachute onto Midgar to fight Hojo and Scarlet, and that's again during a major battle and Hojo's madness screwing up the area you are in.
And occasionally when it is looked down upon from the Shinra Building from extremely far away that you basically can't see anything.
That's like literally all the scenes of Upper Midgar in the whole game.