Just curious -- what do the regulars who have a "day job", do as day job?

Please do not feel compelled to be specific, be as general as you'd like. And I am not a "bot" nor an LLM fiend. I am curious as to from what walks of life the mentality develops to be successful, or at least productively cognizant, at selling options. For my own part, decades ago I got a master's degree in electrical engineering and most of the time I have been involved with digital communications/signal processing, later switching tack to Machine Learning as it also involves the stochastic process and information theory mindset and was a natural fit as an "in" thing to keep an older person relevant.