This argument really breaks down when you consider that it requires a lot more training to become a teacher than an investment banker, and there is a massive shortage of teachers, and none of these factors makes teaching a lucrative career.
Becoming a teacher is far easier than successfully becoming an investment banker. Most people who try end up making teacher territory pay to push paper in a cubicle all day. And they don't even get summers off.
That's no necessarily true since teaching requires a degree and certification, at least in the USA. Also it's an extremely hard job compared to investment banking - the hours are long, you must take your work home, you're usually on your feet a significant portion of the day, and you must function as a social worker and a live performer for a significant portion of the day. Every single day for a term.
And the pressure is enormous, you're in charge of making sure the kids get the tools they need for their life, all while making sure they can survive the arbitrary stuff like standardized testing.
People drop dead in Japan from their jobs frequently as well, regardless of industry. This hasn't anything to do with the job being hard and everything to do with work culture.
I acknowledge that investment bankers have a toxic work culture, but I don't believe the job is inherently harder than teaching, which is unavoidably hard in many ways. Some of the ways are solvable by having more teachers (smaller class sizes, not needing to take work home), but not all of them.
