And the motivations that come with karma don't help across the whole of Reddit. If you write a stupid one-liner in a default sub, it's an easy way to get thousands of points. If you write a valuable, in-depth discussion in some niche sub, you're lucky to get a dozen points.
He's accusing you of being a bot that posts things based on what other people say, rather than a person with valid opinions. It's a procedural generation technique that uses existing content to create new content based on the order and frequency words/phrases appeared in the original. Here's an example: http://www.schmipsum.com/
That's my fear as well. The original is put on a really high pedestal, and it'll be hard to reach that level again.
It's really funny to watch vaccine "debates" on Reddit. You often see two incredibly hyperbolic sides: "vaccines are giving everyone autism and don't even work" and "vaccines are perfect and anyone who can't or won't be vaccinated with everything should be killed", and both sides play with "you're either with us or against us". Of course, there's a bit of selection bias here. People who don't really care much about the issue won't speak up, so the passionate far fringes end up being a vocal minority, but that's just how these arguments go.
You might just have to be the guy to start it. I'm sure there's a lot of people around who would be willing to talk about it (especially if you also tag it #anime). I'm not really a fan, but they're too popular not to have fans here.