But it's great they are not regulated utilities. Because either everyone would have to pay for extra legroom, even if they don't need it, or some freakishly long people would not be able to pay for the extra legroom that they need.
I don't pay a flat fee for my water, electricity, or gas usage, regardless of how much I use. I pay for the gallons, kWh, and therms I actually use. (Yes, there are other fees on those bills, but my usage actually matters.)
Airline regulation doesn't have to specify standardized seat pitch, etc.
I have no difficulty believing you when it comes to customer service. I’ve never had any issues requiring anything beyond the most basic customer service, so I just haven’t been exposed to differences between airlines in that regard. I also understand that a bad experience can leave an exceptionally bad impression. I suppose the only thing that might surprise me is if the higher-cost airlines don’t also have terrible service.
I still avoided them like the plague because the legacy carriers are selling you operational performance and the ability to usually get you where you're going within a reasonable timeframe if you're delayed or canceled. Spirit, Frontier, Allegiant, whoever else, do not do nearly as good a job when something goes wrong. Although they should get a lot of credit - none of them have ever had a fatal crash.
Yes, if you ignore the part where things are different, it's basically the same. Trouble is, those differences do meaningfully make a difference. There's no objective measure for misery and happiness, but flying Jsx is nicer than Spirit. You can put a dollar value on misery, that's why one's so much more expensive than the other.
Also, here in Europe, traditional aircraft carriers have been migrating their quality towards bottom end (ie Swiss not giving any beers for free even on intercontinental flights, microscopic legroom also on intercontinental) while for example Easyjet is for me at this point a high quality reliable carrier with no bullshit. Ryanair is a dumpste3r but luckily they don't serve my nearest airport well.