Jeez, at what age was this true for you? Before puberty, surely. I think folks are mythologizing their past a tad bit here.
Back then, I was practically always dead asleep within minutes of my head hitting the pillow and a snooze was always within easy reach no matter when I tried (wasn’t uncommon to have a 1-2 hour nap after coming home from school). Flash forward 16 years to today and getting to sleep isn’t too much of a problem but it’s much more common to have trouble with getting my head stopped long enough to drift off, especially nights when I don’t make a point of doing almost nothing for 2-3 hours prior to wind down.