I believe you may be discussing cognitive bias... specifically; that an incompetent or under-confident person may not realise the level of their incompetence. Dunning and Kruger (1999) tell us that cognitive bias may exist where a persons confidence outweighs their ability, the 'Dunning-Kruger Effect', or conversely the opposite where a competent person lacks confidence, the 'Imposter Effect'.
Examples. The know it all fire-fighter or CM who thinks there is no room for 'book learning'. Dunning-Kruger Effect.
The bloke down the pub, or radio phone in, or on line encyclopaedia, sounding off about politics, or whatever takes their fancy at that moment in time. Dunning-Kruger Effect. ( perhaps that is me today???).

The newly promoted SM who feels threatened by external experts and who will not take advice, or back down. Dunning-Kruger Effect.
The academically trained expert who will not listen to the experienced fire officer. Dunning-Kruger Effect.
The newly appointed person, academically trained, or experientially trained, who knows they have the right answer but will not speak up for fear of looking foolish. The imposter effect. (Perhaps the 'perhaps that's me today' comment means I am suffering from that today)

Both the efffects can be overcome by partnership working and peer review of work. So let's get on guys.