If you want to stick with the photographer analogy, here's one that works.
Photos at the church $500
Photos at the party $200
Current super bonus offer get both for just $400.
So after church you send the photographer home. Both should be happy. You get what you want for less than the regular price and the photographer has less work than originally agreed to.
No harm done to anyone and that's the point. What's the harm to the airline when you skip the last leg?
The harm is that the photographer already has an established price point for photos at the church, an established price point for reception photos but offers a bonus if you book them for both.
If you book the photographer for both, with the express intent of only using them for the church photos at a cheaper price point than advertised, you are conning them.
There is likely a reason they offer a discount on both, that reason is unbeknownst to the consumer and really isn’t the consumers business.
If the photographer realizes this at the end... And only provides the consumer with half the pictures they took, are you okay with that?
Except that the photographer decided to price the three different items accordingly and he decided to sell you said service for this price.
in fact the photographer is stupid for not lowering his standard rate for "church" photos during the period the promotion for both runs as that will promp everybody to do the same.
Where's the harm for the airline or the photographer in that case? He made the price, he got the money and he had to work less than anticipated to earn that money.
The photographer has their reasons for pricing as such. Maybe they are a reputable photographer for wedding ceremonies or baptisms or whathaveyou (church) and is trying to build a following outside of that. By linking both together at a lower price they are hoping to be hired for events outside of the church.
So someone who only wants to use them for their services at the church, for which they already have a reputation is willfully deceiving the photographer by signing up for both and dropping the latter part of the service.
I think DC10CO put it best. Just because you don’t like the price of Walmart’s TVs, doesn’t mean you get to decide what price you’ll pay and take the TV.
If you don’t like how the airlines price, don’t use their service. Attempting to exploit their pricing model for your gain makes you no better than what you accuse the airline of doing.
They have the freedom to price their service how they see fit and you, the consumer has the freedom to choose whether or not you use their service.
The excuses for doing so just seem like rationalizations for bad behavior.