(25y international travel for work so I speak from personal experience on the kangaroo route(s) in all classes)
This seems weird when we have ferry, train or bus rides that can take days or even weeks. I get that planes are special in their ability to cross timezones and so warp the usual day-night rythm. But that doesn't seem enough to make this a completely novel problem. Is there something else that makes this unique?
A 1920's flight from London to Australia took 9 days and included 8 stops, a day's flying from London go you to (IIRC) Amsterdam, the next night would be spent in Austria. The passengers probably got dinner and a hotel stay every evening...
London-Sydney is only a bit further than London-Perth.