A TQ does not weigh much, does not cost a lot, does not take up much space. It can be used to improvise a splint, to aid in constructing an effective pressure bandage, in addition to its intended purpose. I look at it this way: it is unlikely that I will need it in civilian life but when I do need it it will prevent a catastrophic result.

In my small trauma kit I carry a nasal pharyngeal airway, compressed gauze, an elastic wrap, a triangular bandage and a TQ. My larger trauma kits just have more of the same, along with chest seals, larger bandages and a decompression needle (yes I have the training), and shears.

Most people do not realize how much pressure is required to stop serious bleeding.

Yes, most of my training and experience is focused on combat zone needs.