[Community of A/V Enthusiasts]
The original waveform, as referenced here, really means "the sound being reproduced." One does not need to be an engineer to know if the reproduced sound sounds like the original. Assuming you know what a live instrument or singer sounds like, you can decide for yourself if the reproduction is accurate "enough."
I agree that dynamic range is important, but so is frequency bandwidth and tonal accuracy. Personally, I would rank tonal accuracy before dynamic accuracy, though both are important.
All of that said, I think the original poster was referring to those who lack faith in a science they don't understand; and, therefore, refuse to believe the theory behind digital sampling to record sound. You know, those who persist with the "connected dots" analogies and other examples of incomplete (or inaccurate) understanding of (digital) audio science.