The idea of individual injectors is to get an adjustable amount of fuel to each valve.
When fuel comes out of a carb or throttle body it does not stay in uniform state that is why so much flow work is done on wet manifolds. Fuel is heaver than air, and will not make a turn as well. When I wet flowed my new intake it looked like little streams hear and there and had to make baffles to direct the fuel.
