BSL-2 is a lot more than "wear a lab coat". If it was just that, there'd be no BSL-1. BSL-2 usually also means doing work in a biosafety cabinet and sterilizing disposals, although the controls employed vary depending on the hazards specific to the actual work being done. If you're interested, Yale lays it out in 200 pages of detail: https://ehs.yale.edu/sites/default/files/files/biosafety-man...