That sounds a bit dramatic imo. Hopeless? no. While cast members are reducing their touchpoints with guests they aren't completely eliminated. They still accept cash, still take your dirty plates and cups from you at restaurants, etc. Careful hand washing procedures afterward would protect a CM. A CM could easily read what is on a phone if it is laid down on a surface. A CM could guide me to first aid or call for a manager's assistance. I am not comatose when I show CMs my Emergency Chat message as I can still make gestures. I am not able to write or hold a pen when I get extremely overloaded (I lose muscle strength in my hands) but basic tapping of a keypad can be accomplished. When a nonverbal person needs assistance there are still ways to communicate, even in a covid world , that can be more discreet than hanging a sign around my neck.