When you see an insect struggling, or in pain, what do you do?

I just rescued a tiny roach that was drowing in my tub as I turned on the water. Then I started thinking about how silly that was considering the precautions that I take to keep insects out of the house. I can’t squash them, I feel guilty when they’re killed because of something I did, but I don’t want them to be in my house either. Also, it would have been a different story if it had been a big roach (but why?)

I thought about this awhile back as well when I saw a cricket immoile, missing a leg…..do you kill it out of mercy (or just because you hate insects) or just let things play out?