The thing is, whenever someone needs an interpreter for another language, say, Spanish, French, etc...if there is no interpreter, there is literally no way to communicate with them since they don't know English.
BUT, for deaf/HoH, if there's no interpreter, we can communicate by paper/pen. Even if there's no interpreter, it can be done by lipreading or paper/pen. There IS a way to communicate because deaf/HoH people know English.
IMO If communication fails, it's their fault because there's no excuse since there are ways to get information to the deaf/HoH. They just don't want to make the effort so they don't do it. We have to force them to do the work if there's no interpreter even if it takes twice as long.