I of course didn’t work it out until I got a certain sort of job (13 years ago, for 6 years or so) but being a GM for decades prepared me extremely well for running and chairing meetings in corporate settings, at least in the NHS. It’s your job to make sure the meeting is paced properly and runs to time, while you elicit what everybody around the table wants and give it to them, while getting what you want. Like the GM, the chair does all that and also gets to set the consensual reality of the room. There’s no better training.
Also, my time spent on rpg.net and similar online spaces taught me a lot about other people’s lived experiences, especially about being gay or trans, and being neurodivergent or having depression and anxiety. That’s also been invaluable, both about developing as a person and for my main job (being a family doctor).