Right. In a Redman type suit you lose a lot of that feedback, masks make it difficult to hear, etc. Scenarios as a whole can be more ambiguous because role players aren't actors and you're often denied a lot of the clues of pre-attack indicators, etc. you'd have on the street. You end up filling in a lot of blanks with your preconceived notion of what the scenario is supposed to be. We've done scenarios with over a hundred role players, but that's 1 guy running around with a gun and a bunch of other people screaming, begging for help, etc. It's not really what I would consider shoot/no-shoot training. It's more of sifting through chaos to find the needle in the haystack.
You're telling me if you saw two people engaged in a shoot out, one was in a police uniform and one was shirtless and in baggy shorts, you'd not consider what the person was wearing as a relevant clue in your shoot/no-shoot decision? Of course what people are wearing can be relevant information in both scenarios and in the real world.