Because it makes no sense to assume that the pilots, at least one of whom presumably prefers to continue living, would just circle around to the point where the engines quit?
The pilots are in the same plane as you. They aren’t going to just let the plane run out of fuel because some person on the ground says “sorry, can’t land at this airport yet, hang out for awhile”.
If there was a real emergency they’d be putting the plane down on the nearest runway-shaped surface no matter what.
Further, I’d wager the pilot said something along the lines of “we have twenty minutes of fuel before we need to consider diverting to [alternate airport]” or something to that effect.
The pilots are in the same plane as you. They aren’t going to just let the plane run out of fuel because some person on the ground says “sorry, can’t land at this airport yet, hang out for awhile”.
If there was a real emergency they’d be putting the plane down on the nearest runway-shaped surface no matter what.
Further, I’d wager the pilot said something along the lines of “we have twenty minutes of fuel before we need to consider diverting to [alternate airport]” or something to that effect.