That may or may not be the case with video games like Resident Evil 5 and Dead Space.
The great thing about Dead Space is that you have to aim at the monsters' limbs instead of the head or the body.
Second, if you've been playing video games all this time, Dead Space is forcing you to go against all the instincts you've developed over years of having to aim for the head and body.
I have also decided to start letting you know what I'm listening to as I'm writing this shit. I'm listening to Einsturzende Neubauten if you didn't put together from the record cover above this paragraph. So yeah. Take that.