Therefore, he took out this item; it was effective for the Dragon Tribe and one of the few things that could help dragons avoid the pitfalls of rapid growth.
As for the childhood of the Dragon Tribe... that's actually not too important, as even with rapid growth, dragons still have time to enjoy their childhood.
Moreover, as time goes on, some dragons have started to believe that the several hundred years of dragonling childhood are too long. Even if inherited memories avoid the need for extensive learning initially, they can't be too reckless and play all the time.
After all, some knowledge must be learned. Inherited memories are like a standalone database, containing a lot of knowledge, but that knowledge is like books on one's bookshelf; it doesn't become truly one's own just because it sits there.