Gopher and Gemini can both work on many kind of devices; having a monochrome display, or the differences in input (e.g. having numbered lines works OK, especially since both require links to be on a line by itself, unlike HTML), etc, without the author of the document needing to worry about such things like that. In both cases text entry might sometimes be needed so is not ideal but still it is possible.

What is "TLC" meaning here? Furthermore, for the purpose of keeping out commercial entities, it would be necessary to have the details of what is intended to be avoided and in what contexts, as well as how to avoid certain things; I think simply "keeping out commercial entities" won't do (except perhaps for such things like e.g. indexing services, which can choose not to link to them).