Pretty close. Some of the other digital modes are narrower but as you
state, you need more hardware such as a computer. In addition each of the
other digital modes has its own unique set of advantages and disadvantages
in on air operation.

The biggest disadvantage would be narrowing down the percentage of people on
the other end that would be able to decipher your emergency message.

If you are calling for help, you want as many people on the receiving end of
your transmission to be able to UNDERSTAND your message as possible.

The emergency broadcast system (now the EAS) works on English Voice, NOT with
morse code. And it is designed to be used in an emergency. Same with
police, fire and ambulance radios.

Imagine the president addressing the public with a morse code key. Might as
well talk to a wall.