No one is a nine to five person. Yes, some people are more structured than others and can conform better to that regime, - while others will always be running in the door late, forgetting to fill in time sheets and overtime claims and work better with a deadline looming than to a paced schedule.
But there's just something a bit pretentious and 'ooh look how different I am' about someone airily stating 'oh I'm not a nine to five person. I couldn't possibly work at an office job'.
Yes you could if it was the only way to pay the bills. You mightn't be very good at it but you'd bloody do your best if your mortgage and groceries were depending on it.
Sorry, just heard a student, who looked in her early twenties, on the bus coming out with this remark in a very sneery dismissive manner and it riled me 