The equal point theory is scientifically wrong but good enough in a practical sense. The only thing I would add is that I also refer to the the fact that the air is bent downwards when it comes off the back of the wing ( ie downwash). There are practical reasons why understanding this fact is useful.
The whole point of the exercise should be that it becomes the lead in to talking about what really matters and that is understanding the concept of AOA.
Finally I can't believe people are talking about "lift ferries".
Good god don't you guys know anything
.
EVERYBODY knows that lift is proportional to money.
