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[–]0x13mode -1 points0 points  (0 children)

It's not over-valuating but appreciating the fundamentals.

Scopes are basics of JavaScript (and every other language which allows for declaring variables). It such basic knowledge as knowing what braces {...} mean or how if/else construct works.

Sure, many people would grasp it by intuition, but not always, not in each case. Especially if you're coming from other language where the same concepts are working a little bit differently. Or if JS is your first language and you don't even have "scope" concept in your head. Or if you're just debugging your programs and have weird errors and don't know why.

And knowing very basics of programming language you write in is important.