I understand and accept this. As noted, I think my initial confusion was caused by underestimating the amount of calories burned through exercise.
My second question was as to how this understanding fits in with such strategies as fasted cardio.
I don't agree that I'm overcomplicating anything. I was merely inquiring into the process through which cardio burns fat. It's more curiosity than anything else. Although, now that I have gained a considerable amount of size, I will be contemplating introducing cardio into my training regime probably within the next 6 months or so.
Thanks for your input.