You take a job that pays substantially less than what you can get in the industry because it either pays more than other industry-adjacent jobs you can get. Or,

You take a job that pays substantially less than what you can get in the industry because it either pays more than other industry-adjacent jobs you can get. Or, you take a job that pays substantially less because you are required to teach as part of your post-baccalaureate degree requirements. Some people teach because they want to. They have a strong desire to instruct and mentor people. To help others get better. Some people teach because they have to. Primary education has different requirements than secondary (at least in the US). Typically, in primary education, you need a degree in education specifically and to be certified to teach in the state you wish to teach. To teach in secondary education, you need whatever requirements are set forth by the institution. Typically, you'll need a post-baccalaureate degree or be working towards one. But as far as being "good" at the thing you're teaching. That's not necessarily required.