In 1982 I bought a Bear Whitetail II from the Army Barn. Learned to shoot it with pins at a hay bale. I climbed a cedar tree and straddled a limb that fall. Had a couple deer come down the trail and I was so nervous the end of the limb I was standing on was shaking so bad the deer saw it. Got a shot off and dead centered a sapling by the lead doe. Looked to my right and a spike was standing 10 yards away looking at me. Never saw him earlier because he came thru pines to get there. I've killed truck loads of deer since with a bow but fast forward to this year and I missed the first deer I shot at. Nervous doe in a greenfield so I aim at the hairline on her belly thinking she will crouch when I release. Nope, cut hair but no blood. I've done this more times than I would like to admit but aiming low has helped just as much as it has hurt. Like Shaw said earlier, if you claim to not have boogered up some deer and made some bad shots then you are lying. The good thing is that you learn to be a really good tracker if you shoot like I do. The best improvement I ever made was going to a pendulum sight. My problem is that I was missing deer under 20 yards consistently. I can usually hit any leaf out there now from 3-35 yards. Problem now days is that there is usually multiple deer on a field and getting drawn is the hard part. Heck, the shot is easy once you get anchored.
