Ranking achievements

Can we surmise from achievement points what Blizzard thinks is "important" to do in-game?

I imagine the level of time or difficulty went in to deciding how many achievement points an achievement would reward for completion.

Completing 3,000 quests garners you 50 achievement points. While completing a litany of arena requirements nets you the same.

Achievements involving questing, pvping, raiding, exploring and doing lots of seasonal events all can get you 50 points. So no surprise, this useless exercise proves all areas of the game are equally important. :)