Have you ever sat in a "repro" pub and looked at the woodwork? No self respecting tradesman would ever have hacked the wooden beams in that fashion. No plasterer would leave so many lumps and bumps and scrapes. Even an "amateur" would try to to avoid making such a mess. And so it is with every trade. Why, as musicians, or singers, do we think we need to be out of tune, out of time, or produce an unpleasant tone; surely in the past those who loved their trades would have given them their best?? And so should we, whatever our best is. As Guest DTM says, our HONEST best.
Sometimes, at the time, it doesn't seem to work. I remember a lady singing about the "blows of the blacksmiths hammer" with a purity that suggested she had no idea of the inuendo. But I shall always remember that performance!