Depends on what actually happens to caught animals. Neuter and release is probably the most humane option.

Nah, vets are the ones who have to put them down.

You get to leave the world better than when you started though.

You’re right that there aren’t nearly enough laws and systems to protect animal welfare though.

Catching strays can refer to stray dogs- the job of the dogcatcher, or stray bullets- that is to say they were caught up in something unrelated to them.