One ex-colleague in a previous workplace used to sometimes nod off during meetings.
This obviously became a well known joke.
People being people, no matter their age, would even create a meme video or two.
Not that he dozed off every day during every meeting, but there were a few occassions.
While its easy to conclude many things including his lack of interest and what not, the reality was different (which we can rarely see on the surface).
His kid needed a special school, which was 2 hours away from his work. He sacrificed proximity to his workplace for the sake of his child. Which meant he had to use public transport to commute 4 hours a day, also necessitating waking up 2 hours earlier than most. Given he was very good at his work, a 5 minute snooze means nothing no?