with their grandma having highlighted 24 words in a random book in the shelf

This is a terrible idea. Words in books are much less random than genuine seeds are. If people start doing this, other people will start brute forcing seeds made from subsets of books, and ₿ will get stolen.

This is paragraph is related to the following sentence:

Remember, there are billions of people on this planet. All the stuff that can happen, will happen.

I guess this wasn't clear since the image inbetween confuses it.

I do think all kinds all paper wallets that can happen will happen, no matter how good or bad they are.