It's simpler and more efficient to be one person, have one set of values, treat people one way.  But it doesn't work.  People and situations are best treated differently - ideally, every person and situation must be treated in its own individual optimum way.

This is silly - who can spend that much time thinking?  Neither a single approach, nor a multitude of approaches are best - perhaps merely being aware when your single approach has failed, and you should not use it, or at least modify it, is enough?