It is, unironically, good advice for new hires because it signals enthusiasm and work ethic. Getting in early let's you talk to people before they're swamped. Coffee room chatter is a good way to meet people and build relationships. Beating the traffic means less stress through your day.
But once you start having a real life, this doesn't work. Dogs need walks. Kids come first. You're not a 20 year old with lots of free time anymore, so you can't indulge your boss with the fantasy that you exist exclusively for the benefit of the firm.
Capitalism promises everybody can be above average. In reality, a big majority of people is putting in an above average effort, but earning and owning way below it. Because some slobs in top positions vacuum up the doe while mostly stalling.