No, definitely not. Although it depends where you are. If you are near South America etc, then Spanish would be useful to know.
I have used it before when I've lost a phone etc, or if I had no way of contacting someone otherwise. I can think of more dramatic situations too. Technology can be helpful but if you're overreliant on it then that is a potential weakness.
I would hazard a guess it falls below knowing Spanish but above folding origami cranes.