> These are also giant businesses who "benefitted from electricity", so they owe you big time, right? Or just Apple?
If you mean, are businesses other than Apple subject to antitrust law, the answer is yes, they obviously are. That's not really a gotcha, that's just how the US/EU markets have always worked.
> not be used to also force airlines to make your favourite pickle sandwich on every flight
Whether or not an airline serves pickles is not an antitrust concern. There's this idea people bring up where if the market is regulated in any way at all, then suddenly all bets are off and nobody has any freedom. But it's just plain silly, it's a ridiculous way to think about regulation.
It's like saying, "Oh, you support laws? Cops should be able to pull you over for speeding? So what, they should also be able to come into a restaurant, steal your food, and then slap you?" No, of course not, because those are different things and our society is capable of looking at different actions and judging them differently depending on context. Heck, you want to get wild -- we are even capable as a society of deciding that individual regulations are good or bad on a case-by-case basis based on their likely effects and side-effects.
So saying "the government has the authority to interfere with business practices when businesses are harming the entire market" is not carte-blanch permission for the government to do literally anything it wants. It's a specific category of regulation, one that is well-established within US and EU law.
But yes, if an airline was engaged in anticompetitive activity we would as a country be justified in regulating it. In fact, airlines are regulated today. It's not theoretical, we force airlines to follow rules to prevent excessive customer abuse. We force airlines to follow safety regulations. And yes, part of the reason why we can force them to do that is that airlines are a part of a regulated market where they benefit from regulations, and as willing participants in that market who have benefited from that market, they can't just randomly decide, "no, I'm not part of the market now when you want to regulate me, I've decided that I'm suddenly now a completely independent entity that's divorced from the rest of the economy."