I'm not sure they ever doubled down on it.
They didn't. Hence my insistence: the original comment probably wasn't intentional as such, nor do I ascribe any malice.
Plenty other people felt the need to ascribe intent, however. That's what I don't understand - why are people so eager to defend a phrasing and potential intent without ever consulting the original commenter?
I just don't want to limit how people express themselves
I made a suggestion and argument why I find "they" better, without ideological insistence or being forceful about it. There's no limiting going on.
Its more important to me that someone express themselves honestly rather than they are politically correct.
The above note and specific context aside, I don't categorically agree. While reasonable argument should be the first resort, there are honest sentiments rejecting reasonable argument that deserve no expression, no space and no opportunity to spread hateful rhetoric. I think it's more important to foster a tolerant environment, suppressing intolerance if necessary to preserve that environment, than to grant universal freedom even to enemies of freedom.
Again, this probably doesn't apply here - I doubt the original comment made a point of exclusion. We're getting way off topic here when all I wanted was to offer an alternative argument for inclusive phrasing.
But if I have nothing of substance to add to the point? "This. Also..."? I don't have a Cybertruck or know anyone that does; I can't comment on their quality.
Besides, it wasn't even particularly important to me, just a quick aside. If I care deeply about making people use "they" for inclusion reasons, I'd have written more than a sentence.