Is saying that someone has no expertise in a subject necessarily an insult? To me, your proposal sounds more like a band-aid, instead of treating the core ailm

Is saying that someone has no expertise in a subject necessarily an insult? To me, your proposal sounds more like a band-aid, instead of treating the core ailment: someone who won't recognize their own fallibility. Perhaps it can't be "treated", and we just have to make do with such "band aids". But wouldn't it be more productive if we could just get to the root of it?