I think it worthwhile pointing out that the deliberate misuse of pronouns is often a specific instance of misgendering. But not every case of misgendering is pronoun "abuse".
In almost all content on Stack Exchange, the gender of people do not matter. There are almost no pronouns being used in the community. It's a large irrelevant detail.
In discussions where the gender of someone actually matters, it's not likely that a rule around pronoun use is going to help the community. After all, there are an almost unlimited number of ways one can misgender somebody while using correct pronouns.
A rule against misgendering; however, is more likely to provide benefit, as it covers a wider area of inappropriate behaviour.
This fascination with pronouns has missed the mark significantly. It has brought concepts such as neopronouns front and center, when it should have always been about members of the community respecting each other.
Expressed differently, I think it's one thing to say
"No, zir is a ridiculous word and I refuse to use it"
and quite another to go
"No, you were born female, therefore you are a her".
The conflation of the two benefits nobody.
I feel this question may be answered, or at least partially answered by some answers to other questions, but I think I'm missing some key aspect on why pronouns needs special treatment, and way the CoC needs to mandate behaviour around pronouns, but remain silent on other forms of misgendering.
I don't deny the fact that I may be missing some key aspect of pronouns that make them especially problematic for the community.
I suppose what I'm really asking for is answers that go: "Yes, as..." or "No, because...".