It’s almost certainly an Alaskan trap line and she’s possibly commiting a felony. Lynx are fair game for certain seasons and yes the traps aren’t particularly nice.

they were invented to catch poor people

Well, how else are they supposed to get the bear arms without traps?

https://a-z-animals.com/blog/real-life-wonder-woman-saves-trapped-bobcat-from-trap/

It’s safe, it’s a coyote trap that gloms on without drawing blood or breaking bones. Can even stick your hand in it.