I hope you don't mind me commenting here.

Making free-speech instances in response to the main instance

I didn't make that instance as a response to this instance. I made that instance as a response to ruqqus closing down. Which is where I previously spent every day shit posting. I chose Lemmy because the code base is better. And I'm better with rust than python. I also didn't plan to interact with anyone on this instance. One of the devs reached out to me.

solidifies Lemmy’s reputation as a platform for leftists

That is literally in the side bar. It says right there this is a community for leftest. I respect that and keep my shit posting on my instance unless its something I think someone here will find useful.

it unnecessarily divides and isolates right wing users

I don't think this instance wants right wing content at all. Or users.