Ugo, the issue isn’t so much a lack of understanding of geology (Colin Campbell certainly knows plenty on that topic, but also has gotten peak issues terribly wrong) but rather the more multi-disciplinary approach of certain organizations seems far more capable of understanding and modeling the disparate parts.
I am more disturbed that your experience with even the most basic peak oil history didn’t include Hubbert’s 1938 claim of peak oil (in the US, by 1950), whereas even the geologists (in this case Tom Ahlbrandt, formerly of the USGS and project chief for their 2000 World Assessment) are very well aware of it. By focusing on his latter claims of peak oil, the impression is generated that he got it right the first time, when in fact he had been declaring the same type of ideas nearly 20 years earlier. I understand this might lead some to question the very validity of his method, but this is completely proper for anyone doing scientific work on a topic. You face the facts and the history, it is what it is, and not mentioning such a critical fact is itself revealing.
Just as it is to not mention that Campbell was declaring peaks back in 1990, and his later work you referenced and I quoted was not even close to the beginning of his kick the can technique in this regard.
Basic facts of peak oil, yet those who focus on only the modern part of the claims (certainly are you aware that by 1919 David White of the USGS was also declaring peak oil in the US?), and being particular about the ones they mention, appear to be advocating a position, rather than examining the history of these types of resource economic questions with the objectivity that any university professor should have, and most certainly my years of scientific work required as a matter of course.