It's unlikely that a shop would seek enforcement if it could result in a violent altercation and scare away customers. Likewise police are more likely to expect violence if they are only called in dire emergencies.
I saw a 160lb security guard tackle a 90 lb woman who was probably in her 50s; that was freaky enough. I can't imagine one with resistance.
A friend worked at a Macy's in Nevada for a few years. Staff were told that shoplifters should be assumed to be armed, and that security would not normally confront them. Staff would often stand by and let shoplifters walk out the door with big hauls of stuff. Large daily losses to theft were just budgeted for.