While we seem to be handing out our opinion, here is mine.
As much as I despise someone telling someone what people can or cannot do, I believe in “general” self proficiency tests. In terms of a proficiency test, I say if you cannot hit vitals at 20 yards, 8 out of 10 times you need to practice before you set out to hunt (notice I’m not saying you CAN’T or shouldn’t be allowed to hunt), that’s just respecting the animal we hunt IMO. Even then I’d limit my shots to something closer. I don't care HOW good you are at 8 or 10 yards, bottom line is you need to be able to stretch that distance proficiently BECAUSE YOU WILL SOONER OR LATER do so!
We all know that we ALL will make a bad shot if we shoot enough, I'm speaking about an honest assessment and examination of your abilities.
Having said that, I do not think it is a hunter's place (not the guide)to tell another hunter what he should or shouldn't do. That decision is with the hunter, so no I would not have said anything except for some helpful hints since everyone venturing out to hunt should be doing better than 3'. He is doing something wrong and IMO it has nothing to do with his "ability" per sa and everything to do with his form or equipment (both correctable).
You know I just had a thought about something Rob referred to this week, overbowed?