Summary: Expanding on what maia wrote, I find it plausible that many people could produce good technical arguments against cryonics but don't simply because they're not writing about cryonics at all.

I was defending maia's point that there are many people who are uninterested in cryonics and don't think it will work. This class probably includes lots of people who have relevant expertise as well. So while there are a lot of people who develops strong anti-cryonics sentiments (and say so), I suspect they're only a minority of the people who don't think cryonics will work. So the fact that the bulk of anti-cryonics writings lack a tenable technical argument is only weak evidence that no one can produce one right now. It's just that the people who can produce them aren't interested enough to bother writing about cryonics at all.

I wholeheartedly agree that we should encourage people who may have them to write up strong technical arguments why cryonics won't work.