Of course
How do you know what you know? You either have to hear someone tell you or read yourself
If you're super smart like Einstein you can just use your imagination to discover new things
But none of y'all fit that description
So now, even if you listen to 100 YouTube vids, how does that compare with pouring over in detail thousands and thousands of pages on the subject? If you can read, you can research the things that the person who wrote the book researched.
So obviously studying in greater detail gives greater understanding.
But watch people who never read one non fiction book come in here and disagree