People with a really easy stroke often don’t have a lot of rotation. However, they have enough to get the shooter’s bounce and that’s what matters. The harder you flick your wrist, the more rotation you get. I always found that if I tried to intentionally increase the rotation, I wasn’t quite as accurate. There’s really no need for tons of rotation, just some.
You can see in Cooper Flagg’s highlights that his stroke is easy and natural. There’s no exaggerated flick of the wrist, resulting in a slower rotating ball.