How do you know your neighbors have their own food? Did you ask?
And nobody is interested in what you prefer. The fact is that we are allowed to go to the supermarket to get food, and to restaurants to pick up orders, even if we are not literally starving. Whether you prefer to do so is your business but none of us are mechuyav to copy you.
Kol shekein we are allowed, 100%, to go to our neighbors to pick up food, even if we’re not starving, and definitely if we are. And definitely on yomtov when we can’t go to stores!
Therefore, even according to the opinion that Eruv Tavshilin is for Kevod Shabbos, i.e. we are seriously relying on the hypothetical guests to allow cooking, and even if we accept the psak of those rabbonim, which we do not have to do, we can still cook for hypothetical guests during the current crisis. And for real ones, if they actually do need.