As I understand it, everything about the industry was better back then too.
Case in point: Old Perry Mason shows where characters regularly drive to the airport, pay for a ticket and get on a plane. Flying was actually faster than driving back then, even when measured by time between deciding to leave and arriving at destination!
(Yes, tickets used to cost a bit more. Whatever. Figure in the price for camping in the airport for 4-5 hours, and then tell me the current system is cheaper!)
It would be prohibitively expensive for poor people to fly. I understand why you wouldn’t care about that, but some people are poor and still need to fly if you can believe it.
"Yes, tickets used to cost a bit more"
Tickets used to cost 4-8x what they cost now, depending on route. It wasn't a couple percent extra. A lot of what made flying seem like such a glamorous activity was that everyone but the upper classes was excluded.
An economy class round trip from the US to Japan in the 1970s with Pan-Am was $8,900 in 2026 dollars. About $15,000 if you flew first class.