I believe, without experience, that single aimed fire is superior. Yet there could be times a full auto mag dump could be useful as suppressing fire, especially if there are others to move and close. That is why I favor select fire being removed from the NFA and available for sale again.
There was a reason why the kill rates in AFG and Iraq were so different. Our soldiers had trained to one-shot, one-kill standards and killed their targets. Pretty much every single force we faced or chased in the AO was trained in pray and spray, if Allah wants the target dead, it won’t matter where you aim.
The problem was that throwing enough rounds and IEDs downrange, you sooner or later got lucky. And then they ululated as if they had just won the war.