Unfortunately, yes. The level of adrenaline in a person is a true fear-for-life situation cannot be simulated, and it affects every muscle in the body including those that are used while screaming. IOW it would be a horrible risk for the defense that they have no cause to take.
Good idea, though. No sarc.
I would give it a try and then compare the two recordings. If he can’t recreate it, he can’t. Maybe they did try it, we wouldn’t know if they did.