Wild guess, probably lack of readily accessibility to healthy food -- and hence they're just "stuck" with unhealthy chain food. Best to check the correlation with the existence of healthy chain food (Chipotle, CoreLife, etc) then overlay it and see that it doesn't land most in the red area.

Milk and sugar would be already in the bottom cup -- as coffee will be poured into it and it'll mix successfully -- then cup would be emptied in my mouth a second after.

If that's the average of 70K for US....Uhh I must be in the wrong job?