One of the issues with inflated wait times is that it doesn't allow guests to make informed decisions about how to best use their own time.
For example, let's say Peter Pan has a posted wait of 60 minutes and an actual wait of 45 minutes.
The term
balking is used in queuing theory to describe a line that's longer than the customer is willing to wait.
So if a guest
won't wait 60 minutes for Peter Pan but
would wait 45 minutes, that bad information has caused the guest to miss out on experiencing Peter Pan, which they would have done if the correct information been presented.
These are contrived numbers, of course. But the idea is the same: Guests can't make the right decisions for themselves with the wrong data from Disney.