Quality management is needed because nothing is simple anymore, if indeed it ever was.
Most things don't work like they are supposed to work.
Quality means conformance to requirements, not elegance.
Quality is the result of a carefully constructed cultural environment. It has to be the fabric of the organization, not part of the fabric.
Selecting the right person for the right job is the largest part of coaching.
Eliminating what is not wanted or needed is profitable in itself.