They are not bad in themselves.
It is sometimes the green zone of knowledge- knowing what you know.
It could also we the space where you do not know what you know. This is a yellow zone. You are cautious but capable of moving.
Knowing what you don’t know is yellow too. You are aware of your shortcomings and do not like to attempt what you are not capable of doing.
The worst place to be is not knowing what you do not know. This is a red zone that is very hard to break out of as you do not usually know you are there. Tryouts for American Idol are full of these people.
Regardless of where you are in experience and knowledge, you should stay out of the red zone, do not stagnate in the green and use the yellow to make your green larger.