How to Use Em Dashes (–), En Dashes (–), and Hyphens (-)

I refuse to care about this. A single dash is all I will ever use. I see no possible reason to use the other two.

I take this advice like "do not use a preposition to end a sentence with" and "pay close attention to 'much' and 'many'". Personal preferences from the 1800s taken as gospel by grammatical extremists, to the point where they're taken as some kind of solid rule in a vain attempt to forcefully shape language to a personal preference.

There are cases when you want to follow certain guidelines, for sure. If you write for a publication that adheres to Meriam-Webster, you'd better stay consistent and figure out the right AltGr code to type the right dashes. However, for the 99.99% of written media today, none of that matters.