I think it sends the wrong message.
There are plenty of people here who have quit the first time with no relapses.
This is essentially saying "you can't do it" because I couldn't"? or "you can't do it because someone else couldn't"? Is that how any coach approaches winning at something, by telling people they can't do it?
If I were someone who had never tried to quit, it would surely be discouraging to me and actually give me excuses to fail. It's pretty much on the same level as the propaganda about how hard it is to quit smoking that is passed down from generation to generation. All of us who have quit know it's doable.
What did the first time successes do differently than those who relapse over and over? They thought about what they were doing instead of being overtaken with eXcuses and they learned what quitting was about and what to expect instead of stumbling blindly along.
Anyone can quit the first time and honestly., I've never figured out what the advantage is to quitting over and over and over again.