Most people have fairly routine lives. They stay safely within their defined 'comfort zone'. Nothing really challenges the status quo and there is no real reason to change and grow.
Often, gratifying illusions provide the impression of higher level mental activity:
1. The news
3. The internet
4. Technological toys
But these don't actually require any change. When somebody watches TV or regurgitates political opinions/commentaries, they are not using any higher brain functions at all.
Opinions are the result of memories, thoughts, ideas, the past.
By contrast, challenge lies with the unknown, the unfamiliar, the uncertain...