If I self-host at home and my internet connection goes down so I can't access anything remotely, then I'm still SOL until I can get home. And millions of people are stuck with crappy upload speeds that make plenty of services that they may want to self-host nonviable if they care about being able to access it from anywhere.
Yes, words have meaning, but most of us will happily disagree with your definition of self-hosting.
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.)
Sorry, but nobody chose you as the arbiter of terminology. You can call your option home-hosting if you'd like, but we'll keep considering our scenarios to be self-hosting.
Yes, words have meaning, but most of us will happily disagree with your definition of self-hosting.