This has always bothered me but it never really truly annoyed me until recently. I really dislike the fact that to get the power of standing stone A, I HAVE to go to point B, and if I want shout C, I HAVE to go to points D, E or F. This defeats the game's 'total freedom' paradigm. I understand why they replaced the birth signs with the stones (to stop new players from making permanent choices they might later regret, which is also why the skill perk trees are so linear, so it's almost impossible to make a 'bad' build), but the way we learn shouts, which are the game's defining feature, could have and should have been designed in a more intelligent manner.
I don't think it has anything yo do with Permanency. It's more that it offers you choice. It also spats the User on tyo exploring the world. Basically, what you seem to be saying is that you dislike having to explore (Or put the effort in) in order to gain certain bonuses. It makes me wonder if you haven't somewhat missed the point of the game...
The walls have many rune words on them, which tells me that at one point in the game's development, this was done differently (ie. you could learn a single rune word of your choice from a wall).
This statement is based on pure guess work and personal opinion. There is no suggestion from Bethesda that this was ever the case. It certainly seems unlikely.
Perhaps they didn't want to overwhelm the player with too many choices? If so, this seems to be the recent trend with games: to assume that gamers are morons intellectually challenged and need to be dictated everything instead of being forced to make decisions. I really don't like this trend. I blame CoD.
It's not assuming gamers are morons. It's giving the user choices and challenges, as opposed top handing things to them on a plate. What's wrong with that exactly? I mean getting to some of those word walls is tough. Some of the Dragon Priests guarding are fricking ridiculous to beat early on in the game. The Word is the reward for beating them.
It sounds to me that you are the kind of person who just wans crazy godlike powers from the off, instead of having to work to achieve them. If you want that then I'm sure there's a mod for you out there somewhere. But frankly, where would the fun be in that?