My theory on this is that CMs are using it as a conversation shut-down, not necessarily as a complete definition. Obviously I haven't been directly on any of these calls, but those reporting this are people who were refused
DAS. My guess (only a guess) is the CM uses such wording because it's obvious that guest doesn't qualify by the stated need ("people who do not understand what a line is" or sometimes "people with autism" or similar statements). It isn't necessarily inaccurate but is not intended to be a complete definition of DAS, it's simply a "you don't qualify" conversation ender to avoid going in circles with guests who may try to get more info from the CM about what does qualify.