Word, Phrase or Idiom for a lack of confidence by-proxy

Question

I am looking for a word, phrase, or idiom to express when a person has a lack of confidence in others based on their own personal self-confidence issues. The situation often arises where a decision is made by Manager because he doesn't feel his team can deliver the more appropirate alternative. Not because of a demonstrated inability on their [the team] behalf, but by projecting his own inabilities on others. Does such a word or snappy(ier) phrase exist?
Similar to the beautiful Schopenhauer phrase "Every man takes the limits of his own field of vision for the limits of the world."

user403195 · Answer

I am offering another candidate.
Projection
(Psychology)
The attribution of one's own attitudes, feelings, or suppositions to others, thought in psychoanalytic theory to be an unconscious defense against anxiety or guilt.
American Heritage Dictionary
Alternate answer
Dunning-Kruger Effect
"In  the field of psychology, the Dunning–Kruger effect is a cognitive bias in which people with low ability at a task overestimate their ability. It is related to the cognitive bias of illusory superiority and comes from the inability of people to recognize their lack of ability. Without the self-awareness of metacognition, people cannot objectively evaluate their competence or incompetence.
As described by social psychologists David Dunning and Justin Kruger, the bias results from an internal illusion in people of low ability and from an external misperception in people of high ability; that is, "the miscalibration of the incompetent stems from an error about the self, whereas the miscalibration of the highly competent stems from an error about others."

Word, Phrase or Idiom for a lack of confidence by-proxy

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