Spray-and-pray makes sense for the first minute or so of a meeting engagement, but after that fire control needs to be asserted, not always easy to do in the noise and confusion.
I don't even think we can realistically say that the first minute makes sense.

I think one of the reasons why people are having a hard time getting their head around the concept of the IAR is due to our notion of not just suppressive fire, but how we see it factoring into our TTPs.