Sure. My undergrad engineering program required coursework in economics, and a good bit of financial analysis (net present value, present value of future cash flow, discount rates, systems optimization, etc). Add that to learning how to use spreadsheets to facilitate analysis, and the whole engineering analytical thought process, and it is completely logical that engineers constitute a large proportion of FIRE'ees. That and they tend to earn a good bit of money straight out of college.
In contrast, I bet a good number of humanities degree programs don't require a lick of economics or financial coursework. I know my bachelor's degree in literature did not require any of this.