ISTM the ratios involved are very different. Even a first class air passenger with fifty kilos of baggage only takes up slightly more space and weight than an economy air passenger. Since they might be paying five or more times as much, the service makes sense for airlines. The realtime network you envision is already available to users willing to buy e.g. dark fiber, for less of a premium (relative to bandwidth) than that. If that doesn't work for you, why not?

Yes we know that big ISPs regularly raise examples like this as a reason why they shouldn't have to provide neutral service, but that is manifestly self-serving on their part.