I can see manyspurs point. A whitetail is a very cautious animal. Even under ideal conditions a 'perfect' shot hard to make. An alert deer can duck an arrow even as close as 25 yds - their reaction time is that quick. A walking deer is moving faster than it seems and you will probably hit one in the guts if you attempt that shot.
Since Saturday I've had a lot of buck 25 yds and under. I was holding out for a nice 8 pt I saw on my trail cam earlier this year. But on Monday I had a very heavy beamed 7 pt at 23 yds. but could not get him to stop in either of my 3 shooting lanes. He did stop once between the lanes with only a couple small branches in the way. But experience has taught me that it doesn't take a very big twig to deflect an arrow so I let him walk. But it was all for the better cause on Tuesday morning, a nice fat 9 pt walked right into me and actually sniffed the buck pee I sprinkled at the base of my tree. Experience again has taught me to never, ever take a quartering to shot. I stood still and patiently waited until he turned and walked away. As he did, I slowly came to full draw. When he got 15 yds out, quartering away, I softly bleated at him - he stopped, and my Magnus Stinger slammed into the boiler room, thru both lungs and out the other side. (High Country bow set at 60 lb.) He ran 50 yds and I watched him lay down, and a few seconds later started frantically kicking and expired.
I guess what I am trying to say is that bowhunting requires a lot of dedication, patience and discipline. You have to know your limits and don't push them in the woods. Marginal shots have no place in bowhunting. And if you ever make a less than ideal hit, which you will someday, do not go after that deer right away. If it is within sight, stay put. If not in sight, quietly back out and go home for a couple hours. Live by the adage "When in doubt, back out." In a wooded area a gut shot or liver shot deer will usually run only about 100 - 150 yds and lie down. Liver shot will probably take about 2 - 3 hours for the animal to expire. A gut shot deer maybe as long as 6 - 8 hours. Good luck.