I'll just amplify that point. In an operation, the ability to have some control of your situation is important. Knowledge is empowering. Before an operation, we process the battle procedure, rehearsing what will happen, possible outcomes. If this happens, so what? If that happens, so what? It's just a terminology we use to get an expected outcome.
Then we rehearse and practise that. Going through the plan with the whole team, down to the last soldier, provides everyone with the knowledge of what he can expect. Nothing may go according to plan, but at least he has that knowledge.
The other thing that every single soldier will know is the next step. If there are casualties, he will know what the process is, how you get your buddy out, how you evacuate back, what the protocol is. So knowledge is empowering, and they have that knowledge.