[akoboldfrying]

>So it’s proper to call out the bias of the commenter

I think whether or not their words amount to bias is up for debate, but I don't object to that subject being brought up in addition to the subject under discussion so far.

>and not address their other argument.

This part I don't agree with. That other argument is completely independent, and worth pursuing. Abandoning it completely is conceding defeat on that front.

[boringuser2]

Addressing a biased interlocutor acting in bad faith isn't a proper usage of finite time and attention.

[akoboldfrying]

Imagine a hypothetical person asked you the same question, but in good faith.

How would you respond?