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

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."

Solution 1:

Apologies beforehand for citing Urban Dictionary as I'm sure it will raise many an eyebrow hereabouts.

frog in a well

Used to describe a situation or individual who cannot or refuses to see the big picture because of being sheltered and/or closed minded. This is the opposite of a frog in a field.

You have no idea what skills are required, as you have been a frog in a well for the last 30 years, stuck in the same old job with the same old skills. I have been a frog in a field jumping from job to job learning a vast amount of skills you have no idea about.