A friend called me an IT expert while having lunch together. I immediately said “no, I wouldn’t describe myself as an expert”. I wasn’t being polite or overly modest in my assessment but just reflecting the reality of the IT field. Sure I have a lot of expertise in certain areas but I know nothing in other areas.
When someone says “I’m the greatest or one of the best in xyz” I am reminded of the saying I learnt in primary school:
“A fool thinks he knows everything, a wise man knows he knows nothing.”