The article writer complains about not being able to enter text, but that's what the Key Caps desk accessory was for. It provided text entry via copy/paste for

The article writer complains about not being able to enter text, but that's what the Key Caps desk accessory was for. It provided text entry via copy/paste for keyboard-less "kiosk" systems, which were common back in the day. (My university used them for printing stations and short term internet/e-mail terminals. Unlike Windows 3.1 (which could to be used without a mouse), classic era Macs could be feasibly used without a keyboard.)