Hint: he's not broadcasting a lack of understanding, he's boasting, posturing, that people who think titles mean something are dumb and he is too smart to be taken in by it. Ideas like "titles look better on a resume to future employers" or "titles make my extended family proud when they know nothing about my job or industry" or "bigger titles get a default level of respect from distant employees within the company" are lost on him.

It's not like when people tell you about their low maths ability, that's generally not boasting it's more trying to make a social connection. Like "I'm humbling myself and admitting flaws, not putting myself above anyone else (which would be rude)" or "you computer guy must be a math person, don't hate me because I'm dumb, please be kind" or "I've never liked <those> people, you're like me, right?" where <those> is book-smart people (or any <other_people> target group).