Well, okay! My point was that there are easy, better ways to warmth without heating a room via an additional electrical source. It’s not really an issue of being ‘mean’, it’s an issue of practicality and better energy efficiency.
I wouldn’t personally choose to own an electrical heater and given that I haven’t inflicted any harm on myself via a lifetime of not having one, I reckon most sitters will survive a week or two under similarly awful levels of hardship! 