Sensitive personal data is necessary but not sufficient to rip someone off. And if you want to try to make a living ripping people off, there is even more business overhead, making the cost of sensitive personal data an even smaller portion of overall operational costs.
From the point of view of the thief, our personal data is a vital but cheap input into an operation that tends to have very high security costs, viciously expensive liquidity issues and terrible personnel problems, among other more quotidian business headaches.[1]
I suggest trying to think like a crook now and then. Trying to try on other people's lives is a useful way of shaking up one's thinking habits, empathy (don't confuse with sympathy) is always useful, and it can help you keep yourself more secure.
[1] I am leaving out things like several potential fates far worse than bankruptcy and related issues because they aren't opex-related, but they probably do effect retirement planning.
These criminals trade data because it makes them money, otherwise there wouldn’t be much of a makrket.