Playing as a dragon character is about your character growing as it ages.

It makes perfect sense that adult and ancient should be able to do things that their earlier forms can't.

between 30-50 the majority of players may ascend to adult

between 90-100 the majority of players may ascend to ancient.

If someone takes a hatchie to 100, then they aren't following the natural flow of the game, they have made a choice to bypass some of the options that are available to them.

If I was going to be purist here, I would say that hatchlings should be restricted from doing any adventure quests above 50 to bring them in line with the ancient/adult differences. However thats not my decision to make :P