Why would I leave the "path to riches" to earn - at best - the same as I've made as a teenager? Meaning. Research and teaching give meaning to an otherwise dull life of emailing people I've never met about issues that no one will remember in a few years time. It's fun to work with people, fun to talk about issues that no one quite understands (language acquisition, in my case), and exhilarating to teach students who will hopefully outperform me in every way.
This community is largely driven by money. People ask "How hard is it to make an app that makes $XXXX in revenue?" at least once per week. But there are other things that provide meaning and drive in people's lives. I've forgotten it on a fair share of occasions, but I hope I never look down on someone who dedicates four years (or more) of their time to studying the arts/humanities as opposed to the "hard" sciences or engineering.