Rizzo. Super-future setting in many respects, and a lot of things that are relevant in modern day simply aren't in SARP. Yamatai, for instance, regulates everything in their ships through nano-machines that are in effectively anything Yamatai uses, meaning they could use literally NO insulation or other such materials outside of the armor, and still have completely normal situations. Nepleslia has never been quite as "fantasy tech" as Yamatai, but they've got the tech to stand toe-to-toe with Yamatai, so you can safely assume they have their own versions of systems like that.
Outside of that though, as has already been said, if the GM says something can or can't be done, that's that. As unrealistic as it might seem to you at any given time, the GM is there to guide the plot and make the decisions, and they have final say. No matter how well you justify something, if the GM says it's not going to work, it's not going to work.