Not at all, eating is not part of the contract, only receipt. If you buy a meal at McDonald's and throw all of it in the trash, that's not fraud. It's yours to do with how you please.
What if I repeatedly buy non-stop tickets and don't show up? I have done it a lot. According to you, I breached my promise to fly to the final destination?
The question is, would United sell you a ticket knowing you have no actual intent to fly? If they answer is yes, there’s no problem. If the answer is no, then there’s a problem.