That's asian mindset for you.
"Son, when will you become a doctor?"
"Mom, I'm a salesman, as I always wanted to be..."
"OK, I understand, but when will you become a doctor?"
The MC isn't just a somewhat introverted bachelor who doesn't want to get married. He's someone who is fundamentally lazy, egocentric, and has never learned to deal with frustration - typical of a spoiled brat.
The funny aspect of the manga is the contrast between the typically Asian family expectations and the bratty behavior of the MC. Because if it were just about the MC's life, it would be boring to death: his life is 100% crappy, he THINKS it's perfect simply because he manages to avoid any frustration, but it's as foolish as believing you have a "good" job just because it provides you with exactly enough money to live. He simply can't THINK about getting out his comfort zone to see if there is something better - maybe there is, maybe not, but he doesn't even TRY.
