Good riddance. I mean, he literally brought that up out of nowhere with literally no relation to what was going on, and proceeded to have a debate even though we've had this debate before and I've pointed out that on a list of the 100 worst, most evil Force users, almost or all of them would be Dark-Side users.
That a few people once in a while have used the dark side and not been evil isn't all that significant.
Like, literally and genuinely, he's arguing that because of exceptions we should embrace a set of beliefs and powers which have almost always wound up hurting MILLIONS of people.
And he pulls up several examples from across tens and tens of thousands of years, most of which ended badly, whether because of the Dark Side or not.
Without even mentioning how the Jedi Order's kept peace for thousands of years without giving into the Dark Side.
The Old Order was flawed (especially the emotions thing, though even that's vaguely understandable) but they kept peace and helped people and lived mostly fulfilled lives in the force for thousands of years, keeping the Old Republic safe and helping millions and millions and millions of sentients while doing so.