They didn't have a video to watch. So why couldn't you?
You can of course say the same thing about reading books, instruction manuals, asking somebody for advice, and so on.
Why should there exist any instruction manuals, when you could figure out everything in them for yourself. You aren't a stupid idiot, are you? Then why would you need a manual? And why would you ever ask other people for advice? That's only for stupid idiots who can't figure out things for themselves - not for hackers.
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You can of course say the same thing about reading books, instruction manuals, asking somebody for advice, and so on.
Why should there exist any instruction manuals, when you could figure out everything in them for yourself. You aren't a stupid idiot, are you? Then why would you need a manual? And why would you ever ask other people for advice? That's only for stupid idiots who can't figure out things for themselves - not for hackers.