That might sound OK in theory, but there are a few things that should be universal:It seems silly to knock Ryanair or other budget airlines for their "bare bones" service.
Folk have a choice of flights between most places, so if a person wants a cheap flight, why not?
It is up to the airlines to decide how spartan or luxurious the options are to maximise their income in the sector they are aiming for.
I love to fly on the A380 of course, but I am also happy with my cheap short hop flights to mainland Europe.
The main thing that I hold against the cheap operators is their often very early morning flight times.
1) Luggage. Most flights are for long distances and a significant percentage, if not most passengers are not commuters on the MARC train carrying only a briefcase or daypack. All the people trying to jam rather large pieces of carry-on luggage in the overhead racks is a nuisance and probably a safety hazard. And once you add the baggage checking fees, the "low fare" isn't o low.
2) Seat size. This could be a potential safety hazard with regards to rapid evacuation of the lane in an emergency. I have heard that the the current cramped seat configurations have supposedly be tested or modeled for this and have been approved by regulators, but, frankly, I would be skeptical of models or test results prepared by companies that have a financial interest in the results, and we all know how regulatory agencies can get "captured" by the businesses they regulate.
3) Given the climate crisis and the fact that airliners have a very high intensity of greenhouse gas emissions in sensitive parts of the atmosphere, I don't think it's good public policy to encourage the growth of airline passenger miles through cheap fares.