The tech exec who eats exactly 1,977 calories a day
No, he doesn't.
It's pretty much impossible to calculate EXACT calories in food you're eating, as various foods types will have variations that are slightly larger or smaller than normal, even if you're being meticulous with a food scale. You can get a pretty close margin, yes, but to definitively say "I eat exactly X calories every day" is a silly statement.
Maybe "My daily calorie target is X" or "I try to average X calories per day in my diet," but you can't be precise to the calorie.