How do they not see the problem

Saw this on r/Islam and I just don't understand. How do they not see that if a book needs this much explanation, that it's not the clear final divine revelation they think it is? I've needed less books to understand physics and computation. So how can they see this as a good thing?

Saw this on r/Islam and I just don't understand. How do they not see that if a book needs this much explanation, that it's not the clear final divine revelation they think it is? I've needed less books to understand physics and computation. So how can they see this as a good thing?