“Our jobs prevent us from burning any appreciable calories. If we were active, we’d have little issue with having more carbs.”
Don’t be so sure of that. Watch some videos by Dr. Noakes, who’s run 75 marathons (and even longer races). His health took a dive, right into diabetes - which killed his father.
In any case, you’re certainly doing the right thing now!
There are issues with running marathons. It’s not healthy to do long-term.
Better to do, short, high-intensity workouts.