I'm so glad I'm not wasting my life working in finance.
I hope to continue to "waste my life" for many years to come.
Make a trading strategy to make money
vs
Make a cutting edge machine learning classifier to back out latent meaning in search queries to produce better search results to drive more traffic to google to sell ads to make money
I find the work in finance / tech very interesting. Societally useful ? Almost certainly not. But probably still more than most good-paying tech jobs.
It's one thing to make recommendations or calculations and give the report to a human. It's another to start trading high volume in real time automatically.