[PlasmaKrab]

Would you mean assuming the LAWs are always fired in volleys, then raising HEK and accuracy, and reducing ammo?

Remember the game is IGOUGO, which means that when you have an infantry squad firing several LAWs in a row in the same turn, in 'real time' conditions they might very well be split-second apart. And the accuracy rises between each shot as the firers have a chance to learn and adjust their sight.
And if htey get spotted along the way they can be sure to trip into a 30m-bullets' nest like you said, spare LAWs or not.

Now go and try to refrain an inf squad from wasting all of their LAWs in reaction fire, at top range against an ERA tank...

Does that make few enough shots for you?

Cheers,
Plasma