These people are TERRIBLE friends
I'm in the early stages of season 6. One thing I've noticed in the last dozen or so episodes is that these monsters, when one of their friends (or even people they don't know that well) are caught by the walkers, just look at them getting eaten - literally having their flesh torn away by teeth which would be fucking agony.
In so many instances they are just a couple of feet away and armed, and they just walk away and let it happen. Shoot them!
In this world the 'infinite ammo' cheat is usually on but they don't waste a single bullet putting doomed people out of their misery.
Not only should you end your friend's pain, but it's possible that when they turn it could be an eternal 'locked-in' conscious nightmare.