I believe that Lawyer is speaking for the concept that all risks must be weighed, and blind adherence to absolute elimination of one risk (ie, never ever never even THINK about being in a place where an engine failure can't be easily handled) is not wise. No absolute is wise.
Weighing risks is what we do well, telling others how we weigh them we do fairly poorly. You will see that most folks who successfully operate their machines follow no absolutes.
Singles are quite safe, very efficient, and not sub-standard.