I was referring to bealzebub not you. But what do you think? Do you forgo your rights to the main course of a three course lunch, paid for in advance, because you didn't want the starter?
And what has the price of a deal got to do with your obligations/rights under general contract law? Two people sitting next to each other on a flight with exactly the same fare rules can pay totally different prices. That's how the airline likes it, that's what the airline does, don't start arguing you have more rights because you paid more. The airlines will never go for that, and neither would a judge.