Why would you waste all your money on all of those skills first off? There isn't enough skill points for maxxing HALF of the skills.
Sorry but I find this quite humorous.
I'm sorry, but I don't find it humorous at all that I have to go back to a save several hours before just to fix such a ridiculous oversight.
As for why I did it, because I wanted to. That alone is reason enough to be able to do it without getting locked out of a feature that is most likely necessary to really take advantage of the skill caps in the first place.
