The key question in this is: is there any who had not looked at one time or another? If you hear a noise, the tendency is to go find out what it is. Most everyone knows that the likelihood is that it's something innocent (or not so innocent, depending on whether you have children/pets) so you want to find out what happened.
Sure, and I don't think anyone is saying never go check on a noise. I check on noises all the time. But if I hear a noise and think I need to grab a gun before checking on the noise, I'm going to get some help first.