I don't get why people (who haven't worked at these companies) think everyone works 10+ hours at these companies. I have worked at one of the big tech companies

I don't get why people (who haven't worked at these companies) think everyone works 10+ hours at these companies. I have worked at one of the big tech companies before. I probably got 6 hours of real work done per day (including meetings), the other 2 being spent eating, snacking, or dicking around.