Strays are still animals, and just like any aninal can be tamed
Anyone who sees it as okay to off a stray when it isn’t hurt or sick, imo, is a monster
I’ve owned three cats in my life, two of them were strays, entirely wild when we found them. We fed them, raised them, taught them. Sadly one passed away from old age, but the second still lives today and is sweeter and more friendly to humans than any other cat I’ve seen. Has never hurt a person, ever, despite having grown up in our local woods hunting birds and rats.
I’d gladly aid any other stray cat/dog I meet, and the least a person can do is leave them be, or if they re disturbing, just shoo them off rather than threaten or hurt them.