Race distributor

Why do you need a race distributor? There are several options.
1: a stock recurved electronic dist.
2: A stock fixed (lean burn) dist, and a digital box that allows a custom curve
3: Crank trigger, and coil on plug system.

Myself I run a "lean burn" dist fixed at 15-20 degrees (depends on how much nitrous), and a MSD 6 box. Not good for a street car.