All of modern photography was built on snapshot photography with cheap cameras and film processing to encourage film sales. This migrated to vacation slides, slide shows, and Polaroids.
For nearly a century, everyman capturing the days of their lives photographically was a staple that built Kodak, especially, into the monster they were.
Cell phones are just the latest instrument in an unbroken chain that started with Brownies and ended with SLRs.
It is an idealized fiction that the Good Old Days were better and that people on holidays were more engaged with the environment. Then-, as now, it depends a whole lot on the person and the venue.
The only thing that is almost unarguably worse today, is the larger society's lack of decorum, politeness, and mannered behaviour which is really what underlies the obnoxious habits noted in this thread...