I know you are one of the worst posters here, but what the ing are you getting on about?!
Pop has a vision for the kid, unfortunately right now that means sitting and learning. I think he'll get his opportunities as the season moves along, but he needs to make the most of them and better understand his reads & rotations.
Also, I don't believe that getting reps against inferior compe ion in the G League will do Lonnie any good. He needs reps against NBA - caliber opponents and that isn't widely available on the developmental squad.
Lastly, Jerome Robinson - who was selected a few spots BEFORE Lonnie - is having the same issue with the Clippers & Doc Rivers the last two seasons. As well as a few other 1st round picks throughout the league, so this isn't just a "Pop is stubborn" thing.
Coaches want to maximize their chance of winning and that isn't entirely possible with too many young players in the rotation.