If you are interested in getting high level ukemi skills, just practice rolling and falling a lot. All you really have to do is take about six years off from trying to learn how to throw and spend it on learning to fall instead. This is of great benefit to the beginner because when you get back into trying to learn how to throw, you will then be able to attract the best people as training partners.
I would agree with this and I would add:
This is of great benefit to anyone at any level of practice for the above said reasons. And if the 'best people' were also training this way imagine how many wonderful people the art we would be generating.Now that's evolution!