It's not a job that is easily displaced by code.
I don't see why we can't automate the workflow of coke snorting gordon gekko wannabe fuckboys on wall street in the next 15 years as will a large chunk of professional careers. To boot, we see lot of the floor trading becoming automated as a result of the innovation we had in the past 15 years.
Luddites of the 21st century will hit the mid to lower upper class hard, I'd love to work on such problems.
We've had plenty of stuff like NLP for 10-Ks and management calls but the job has been relatively unchanged overtime save for the introduction of CapIQ, Bloomberg and Excel. Which isn't to say that it can't change, but that it probably won't happen anytime soon.
GP's question was "Why is the industry standard high?"
The skills acquired at their day jobs also enable them to be much more financially savvy than tech workers. Tech workers, I imagine, get better work computers for similar reasons.