The GR Corolla isn't really the same as a Corolla. Different engine, drivetrain, brakes, wheels, exterior, interior, suspension, and more, all built to be a sports car.

It's also very highly acclaimed for being fun to drive, comparable with the other fast hatchbacks (Golf R, Honda Civic Type R, etc), and is pretty fast.

Most people getting a GR Corolla aren't getting it only as a point A to point B car. So your point about it basically just being people transportation is mostly moot.

It's also really completely different from a standard Corolla.