Francis Gano Benedict, James Arthur Harris, Tom Venuto, Thib, and hundreds of others. You find me one person who uses 1.2 for moderate activity.
You can't account for all activity, additional calories needed aren't just what you will burn in the hour at the gym. The facts are he isn't sedentary, whether your figure is based on that or not. I've tried the accounting for all calories thing before and it doesn't work.
How exactly have you proved it's far from accurate? Because you say so and you've pulled a few figures out of the air?
Moderate activity is moderate exercise three times a week. 1.2 is light activity 1-3 times a week. Where? A biometric study of basal metabolism in man by Harris and Benedict.
bmi-calculator.net/bmr-calculator/
You're quoting me all these figures thinking you know, being anal to a silly level. Believe me I've been there before, you can't do it. You can't know who's going to burn how much doing what. Which is why we use baselines and then scale down or up accordingly. It works much better.
It isn't as clear cut as saying he's going to be laid on the couch all day, burn 550 calories in precisely one hour at the gym and then that's it.
2,500 calories includes athletic people? If you were one I'm sure you'd know that that wasn't the case.
But you're just going to come back and say the same stuff so get off your high horse calling me stubborn. I am. I know. Because I'm usually right. When I'm wrong and it's proven I will admit so, I have done plenty of times in the past.
1.55 IS the general figure to use for someone training three times a week, you seem to think it's 1.2 as you used above. It's not. Real-world experience, if not the experts, should tell you this.