Earlier quoted context omitted.
If there are 5 bananas in the entire world and people are still allowed to pretend and sell 500 bananas - you dont see how this is a problem? Have you actually thought this through?
You can absolutely sell 5 bananas 500 times. You can't have 500 net buys (i.e. someone is 'long 500 bananas', or 500 people 'long' 1, etc.), but sales, fine!
But that is not the point. The point is you had 5 bananas to sell and 500 people who bought 1 banana each. Now all 500 monkeys wants its dinner so please deliver. If you can't it is fraud.
The mental gymnastics in the stock market are insane. More shares have been sold than exists. That has nothing to do with the amount of times they were sold.