If there is an emergency in a building and the first responders (police, fire) have an accurate layout of the building they are able to get in quickly and efficiently. There is no trial and error and there is no time wasted trying to figure out which way to go. Those moments may mean the difference between life and death for one of your employees.
Also, in going back to the work flow analysis, (See Why would anyone need an As-Built Drawing?) eliminating potential dangerous situations and maintaining compliance with OSHA regulations can reflect your on-going and proactive efforts to prevent injuries in the workplace.