Thank you for the explanation. I guess I just felt like some of the new achievements were so specific compared to some of the older ones, like having three different achievements for looking at things through the spyglass, versus visiting 40+ biomes combined in one achievement.
Also, is there a specific reason why the "Wax on" and "wax off" achievements are combined in the Bedrock Edition? You say you want to have them separate, which I now understand why, but they are not separate in all versions of Minecraft
The spyglass one was definitely not teaching/onboarding and more just silly challenges. There's room for both, although realistically those sort of advancements feels more like what I'd consider "achievements".
Achievements are different in Bedrock with a different purpose, and if we can avoid having too many small achievements the better. They're generally meant to be challenges more than onboarding tools.