You're right, 95% of people won't notice this, but in any given scene there are dozens of tiny details that only 5% of the audience cares about. Over the course

You're right, 95% of people won't notice this, but in any given scene there are dozens of tiny details that only 5% of the audience cares about. Over the course of a 2 hour movie, if the crew has cut corners on all of those little details, everyone notices a few things, and the suspension of disbelief is a little less suspended.