[Almighty So]

They simply sold tickets for seats they could not accommodate. It had nothing to do with safety or fuel or weight. They overbooked.
A normal airline would accommodate the passenger in some way shape or form.
Not him him in the face and drag him down the aisle.
I'm sure if another passenger was offered some compensation to take his place (considering the only reason he refused was because he was a specialty doctor flying to see a patient) in sure none of this would have had to happen.