Good Idea.
Fishing can be done with little effort too.
For survival needs, it's a good choice provided you are next to
some body of water that contains fish.
It's more likely to catch fish in such cases than to snare game.
The Mils Spec survival fishing kits are found on ebay and such and cost about $20. Well worth it or just make your own.
Of course a lot of people may not have the streams or lakes accessible for fishing.
All in all a very good idea plus it may serve to calm a person down and give time to plan the next step(s).