MagicManICT wrote:maybe you don't deserve the mammoth?
The thing that the fact of deserving anything actually defines involvement in the game and "replay value".
Like, if for a certain period of world time you and your group has not grown to achieve certain technologies/qualities/whatnot - there is no sense and motivation to continue play, unless you are roleplay village.
Yes, you can kill a mammoth by organizing a small squad, but without farming them you will be unable to build kiln, and compete in quality
Same with whales, dungeons, trolls, everything - most of game mechanics are so complicated, that can only be achieved with cheesing and other feature using, if you just remove them - you will leave completely not working game mechanics.