Maybe, but I would caution against assuming that either age or experience are antidotes to the phenomena described in the article. I've met some very experience

Maybe, but I would caution against assuming that either age or experience are antidotes to the phenomena described in the article. I've met some very experienced people (as in multiple decades of experience) who were still pretty insecure, and it definitely affected their work in exactly the ways described in the article. So to me it seems like genuine self confidence (or lack thereof) is a bigger factor.