Without reading a single reply in this thread:
Because one gameplay mechanic is difficulty and figuring out how to overcome obstacles is the point.
If you want to take that away you should just go watch a movie instead.
I know this seems like gate keeping and sounds elitist but I claim it's not. If you don't want the challange, when the challange is the point of the activity, you should go do something else. Every activity isn't for everyone.