Yeah, in the end it doesn't matter that much. Obviously, there will be some grey areas. But at least we generally know what it means if someone says they went on a supported tour of XYZ vs someone who says they did an unsupported/self-supported tour of ABC. We also mostly know what creditcard touring is vs. tenting/camping and so on.
Hell, most of us also have a good idea about the difference between bike touring and bike packing, even though the latter is a subset of the former. There is even "basket packing" now. Guess what that involves?