Mike,
a healing wound does not necessarily have to be infected. Also some scar tissue can appear to look similar in texture to a scab. and im betting Snake scar tissue looks a lil funky
Will quality of life be poorer then normal, absolutely with out a doubt.... does the little guy who hasn't given up yet and just taken his last breath deserve a shot? well its your call. To look at it from another side. if the snake didnt want to live would it have already passed on on its own free will?