the reason for all of these flaws is because it is a game. i real live there is no way a human could have a 18 str. mabye a 13 but thats it. same with all other abilities. in D&D you are adventurers and are super natural for just that ability not every one can adventure. i mean if you really think about it nothing really makes that much sense. do you know how amny times i have been killed and resurrected or knocked out to -6 but been healed and then kept on going. i real life if i were killed and resurrected (and this goes for everyone) i would start reconsidering my carrier and become a baker or some other occupation were people dont try to kill me for any random reason. another thing(this is my last) is that if i got to 5th level in real life i would quit adventuring becuase no body i a hundred miles could really beat me i could destroy an entire town if i felt so inclined. i guess my point is that this is a game and not many things really make a ton of sense.