I understand where you are coming from but I think too many people would abuse it just to level up quickly, which is why Bethesda edited the levelling of many skills compared to Oblivion.
That's why you have limitations. You can only do it once every level, kind of like how many times you are allowed to train from experts, but just to have action to go along with learning.
Theres a mod for that.
http://skyrim.nexusmods.com/mods/12395/
Ya, for the PC. This is the PS3 forum is it not?