This is a classic myopic HN reply. I will be downvoted for this harsh response: You fuckin' dummy, "bond trader" was an example profession that is (1) high income and (2) needs to arrive early to work. Probably most lawyers and many medical doctors would be simliar. Also, if you own multiple pizza stores that need to get started early, the same rules would apply.

It was an intentionally myopic reply. Most jobs have fixed start times that people can't change around to avoid traffic unless you want to add an extra hour of dawdling before and after work. When someone complains about commute traffic, do you suggest they switch profession to lawyer?

There's no "trick" here. Its just a repackaged form of what literally every commuter knows that leaving early can beat traffic.