For me it’s less a case of ‘I need this ambient music to fall asleep’, and more a case of ‘I enjoy listening to this ambient music and also I can fall asleep to it’.
It’s changed a bit for me now, but when I was a teen I used to just whack on whatever I was listening to/enjoying at the time to fall asleep to, be it ambient, death metal, jazz, classical etc.
And as far as listening to people talking goes, that’s nowhere near a ‘this generation’ thing. The sound of quiet voices murmuring on is just a naturally relaxing thing, think of a parent talking to their baby to get them to go to sleep.