"But what if they did x, y, and/or z! They need to be held accountable!"
I means it's honestly unlikely they did x, y, and/or z. Most call out posts are just bullshit lies or so taken out of context that they're just as fraudulent as a bullshit lie.
However, if they did? A callout post is useless. It's utterly pointless.
A callout post does nothing but:
Isolate the supposed perpetrator, making it impossible for them to stay in a community that would otherwise be able to go "Hey bro/sis/sib, that was fucked, let's talk about it and fix it".
Puts a spotlight on the possible victim that prevents them from recovery or healing.
Creates drama that creates damage for all parties.
And that's if their was any truth in the post.
A callout post that's just a bunch of garbage though? That:
Isolates the victim of the slander, leaving them volunrable to attacks and harassment
Feeds into transphobia both generalized and specific to the victim of slander
Creates infighting, gatekeeping, and policement of the community
Often forces people who had nothing to do with the initial drama to take part in a now ever delevoping drama, which creates more callout posts, more slander, more harrasment, and more attacks on community members. Most often effecting the most marginalized members of out community.
Forces people to view content that is often triggering and demands that they make a moral statement about it, while trying to process or cope with the content.
Creates room for Terfs, tehms, radfems, and transphobes of all brands, to stick their ugly heads in and go "see, I was right about the trans cult, do you see what monsters they are".
There is never a valid reason for a callout post. There is no callout post that has ever successfully "held someone accountable for their actions" and there is no callout post that has not done damage to our community.
