It's rather easy to dominate targets that don't shoot back, but in the real world, the bad guys would return fire, if they didn't actually initiate it.
The exercise struck me as very "optimistic" in more than one respect.
For one thing, it assumes that neither of the good guys are wounded or killed, despite being significantly outnumbered. By my count, there were at least nine bad guys, and if only one or two of them were even halfway decent shots...
For another, the good guys are wearing hearing protectors, something they wouldn't likely be doing in reality. Thus, after firing SBRs numerous times inside the car, wouldn't they be pretty much deaf for some while afterwards (if not permanently)? How likely is it they would be able to hear each other call "Moving!" or anything else, except an incessantly loud ringing in their ears?
BTW, what's the rationale for after engaging the target to his direct front (from within the car), each good guy then proceeds to engage the target that had already been shot several times by his partner?