Gotta have a strategy for deciding on a stopping point. A good overall goal for a social media argument is to get people reading to consider things

These two are the main points in my eyes.

I do engage in responses and discussion to a specific comment or person, but only so far as it seems like a productive and good or decent-faith one. Beyond that, I consider whether it's worth it to set the record straight.

If it's a public, shared resource that we have to cultivate. Giving it up to the loudest or strongest-opinioned would be a negative influence on the community. I think a sense of justice, correctness/validity/truthfulness, and moral also plays into it.

I enjoy reasoning and formulating, and also thinking about how best to approach or defuse (bad) arguments/bait. The act of doing so is practice as well, useful in other situations, too. So, even ignoring the public record/shared resource aspect, it's not like you gain nothing from formulating responses.