I work in finance (trading) so from my perspective, I have seen many people come into this field wanting to "get rich." They soon find that the most successful investors/traders are not those who want to get rich, but rather love financial markets. So I am in complete agreement with you. The equivalent, I think, would be me joining a web app startup to "get rich" because I want to be "rich", rather than I am passionate about exploring the problem space that I will solve with the web app.

As a side note, the reason this is always the first site I visit when I am on the internet -- because everybody is exploring their chosen problem space passionately for the fun/excitement of it.