I see what you are saying and it does make sense, but most people want to see a torque figure and if they see that figure starts from near idle and goes all the way to 5000odd rpm they can see that the car will pull easily and effortlessly up hills etc.
Well thats the way i look at it anyhow.
take my twin Turbo Soarer as an example, makes similar power and torque to the BMW but torque doesnt peak until 4800rpm, and peak power is something like 6400
I would do almost anything to have a torque curve teh same as the BMW.
Especially when over taking trucks and stuff when going up the snowy's like i did last weekend, I needed a boot full of 2nd gear (auto trans) to get the thing accelerating hard up the hill.