Bottom line is that you are thinking too hard about a simple thing instead of being grateful. In giving enough VP in easy/normal/hard to max all techniques, the developers made it so that even the most casual player can play through any difficulty and have plenty of points to spend, even if they don't bother collecting a single thing. There need not be an achievement for something like soul collecting to be included in the game.
What if you had to complete every mission on normal and have all collectibles (and souls) just to have barely enough VP to max only 1 technique and 2 skills? Bet you would find that annoying and even more confusing.