I thought this was a good read.
"Approximately 70 percent of us will experience a period of self-doubt at least once in our lives."
This manifests itself in many different ways and is present 'between the lines' in some of the questions posed on these forums *.
This article suggests five strategies for rebuilding confidence.
Number 4 is "We can help each other"...
"Seeing that feelings of Imposterism are fuelled by anxiety, low self-esteem and self-doubt, we can all help each other counter these feelings by fostering a supportive environment."
You could argue that is what we are trying to achieve on this Community.
* no shame in that; much more unattractive is the individual who is so boundless with self-confidence and obdurate in their denial of the overwhelming consensus of the advice received... that they plough their own furrow regardless ;)