Um....
You seem to not understand the nature of this feature. Let me break it down for you.
Ahem...You first need to realize that this optional, as in it's not mandatory. Secondly, you need to realize that easy games to you may still be hard for others. Thirdly, because of how intuitive this feature is, those who are having trouble can immediately see how to prevail, ie learn. (because no one; even casuals who you give no credit to, want to watch a game)
Now those three points make up our forth. This feature will allow Nintendo to make games much more challenging, while still making them highly accessible. And that is what you seem to not understand.