simplicista

Etymology
From.

Adjective

 * 1) what or who heals with simplicities
 * 2) What or who writes about medicinal simple
 * 3) relating to simplicity
 * 4)  One who has very simple reasoning or uses very simple means

Noun

 * 1) what or who heals with simplicities
 * 2) What or who writes about medicinal simple
 * 3)  One who has very simple reasoning or uses very simple means