Comfort is part of handling. I dont know what you mean by "why are all performance cars slammed on there asses?" what does that mean?
Racetrack production cars and Nascar have lowered suspension, but it is mainly to reduce frontal area to reduce drag, and to create downforce from the vacuum under the car. Low profile tyres also reduce the tyre warp effect at extreme lateral g force, but when LP tyres 'let go' it is more suddenly and you are likely to spin off.
But you dont encounter extremes of lateral g on the Queens highway. It is not like a racetrck, it is full of potholes, speedbumps, ruts, whoop de doos. And thats why you need springs. And as I have mentioned already, springs keep the wheel in contact with the road surface for longer over rough surfaces.
Lowering cars and putting huge alloys on the makes them worse handling, but it is all fashion, racetrack imitation. I went to a Bolton Wanderers footballers house, and he has a Range Rover Sport with 22" alloys and wafer thin tyres, How is that going to help off road capability?
You're right though it does look like a young persons car, they learn later on