If you're watching a fextralife guide it's to make the game easier.
Why on earth would anyone watch a guide that offers no help to that effect?
You just... wouldn't watch guides at all.
Well, I don't tend to look at fextralife guides specifically, but when I do look at build guides, it's not so much to make the game easier, but to help me understand mechanics. I've looking at a fair number of Sin Tee videos, but I've never adopted one of his builds "as is." They're optimized for combat, and combat is only one of the things I care about when creating a character. Still, I like my choices to be well-informed, with at least a moderate understanding of implications and trade-offs.
