Hey there!
It's false.
The reason people may say it's not necessary to think about is that the book might be a fiction book, and since fiction books aren't real, then people might think you can't take any value out of that. However, this statement is false. Reading for pleasure or informing still gives you knowledge. You still get things from the plot and they could always help you. Especially if it's from nonfiction, thinking about the text and making applications is always necessary in order to maintain good reading habits.
Hope this helps!
