..."The Force" was split into "The Light Side of The Force" and "The Dark Side of The Foce" and darkness somehow became equally as important; this is probably my biggest bugaboo with modern Star Wars. The "Dark Side" is a corrupting presence one needs about as much as an otherwise healthy individual needs a concentration of cancerous cells.
We can thank missinterpretting Revan for this shit. -_-
I think it goes back further than Revan, though he was a big contributor.