I think Allen nailed it. If a target unit waited until it was hit by fire before deciding it was going to ground, those men would be casualties!
Whether a unit chooses to stay “suppressed” or do something else has little to do with the shooter and everything to do with the training leadership and motivation of the suppressed unit.
BTW, Allen’s example of paralysys to fire from MILES equipped weapons is too much, LOL. My guys used to position a group of 3 or 4 guys around an M-60 (usually an ambush situation). The report from the M-60 was often enough to auto fire the M-16 — thus allowing the firepower of the M-60 to increase x4 without using any of the ammo issued to the M-16 😉