Let us imagine you are playing an mmorpg and that there is a button on the side of your screen which instantly, legally boosts your character to the max level fully equipped with max armour, max stats, max rep, max everything and all unlocks in the game. Let us further assume that once you press it you can never go back. You can go anywhere and do anything you want in game as a max level character but you skip all the pain and joy of levelling up.
Would you ever press that button?
Are you sure?
If you said no, do you really think you could avoid the temptation to press that button as you spend hundreds of hours grinding your way through the game.
If you said yes, what do you think you would do next?
Inspired by this post from Tobold. I will give my own answer in the comments.