Reminds me of self sufficiency farming. If you grow your own food you will be impacted by the yield of that farm, rather than going to the supermarket and buy the food there. If the soil is bad then it might be difficult to impossible to do self sufficiency farming.
What you describe is an unfortunate result of the terrible bandwith situation at your (and others’) location. It is not, however, a compelling argument to redefine a term to suit your liking.
(Also, with 4G, 5G, and satellite-based Internet, an alternate (albeit low-bandwith) route for emergency access is fairly straightforward to set up.)
Yes, words have meaning, but most of us will happily disagree with your definition of self-hosting.