I’m an emergency physician and we use all of the above medications with the exception of general anesthesia.

Benzodiazepines are considerate anxiolytics whereas propofol would be considered moderate sedation. Neither of these require airway control (intubation) because people tend to keep breathing on their own and we really would much prefer that.

With general anesthesia, you cannot protect your airway whatsoever and will need some form of airway control via either endotracheal intubation or LMA.