“Simple” is valuable because it is rare; “simple” is rare because it is so hard.
“Simple” is often confused with “easy,” which means running the risk of being judged as wanting to avoid doing the “hard” things.
“Simple” communication means running the risk of being judged as lacking a sufficiently intellectual vocabulary.
Using clear, “simple” language that aims for understanding instead of the byzantine legalese that seeks to cover every possible contingency means running the risk of being judged as too willing to run risks.
Proposing “simple” solutions means running the risk of being judged too unsophisticated for the modern world of complexity.
Using “simple” illustrations means running the risk of being judged an amateur.
“Simple” requires humility to be content with the problem being solved without expecting others to be impressed by the sheer complexity of the solution … and thus with the vast intellectual prowess of the mind behind the complex fix.
“Simple” requires innate self-confidence, because impressing others is not its concern.
“Simple” requires imagination, because following the rules rarely will take you there.