Why are there so many damned suggestions for Trophies that you'd get purely by playing through the game? The point of Trophies is that you get them for completing some form of milestone, the completion of which is worth the awarding of said Trophy. What is the point of a trophy of you're simply going to get it by playing the game normally? Does no one remember Skill Points and the like from previous generations, before Acheivements took over and developers felt obliged to fill up a certain quota with them? Rewards for doing something contrary or straying from typical gameplay, things that can only be obtained by going off the beaten path? You know, the right way to achievements and trophies?
I couldn't agree with you more. But fact of the matter is that developers give out achievements for menial tasks. Are they truly "achievements"? No, but there are many games that actually reward skill, not simply natural progression. It's not a problem to incorporate both in this hypothetical list.