"Nothing can compare to the local knowledge gained over many years by detectorists and local amateur historians who are both driven by passion and not career opportunities"Discuss. That really depends how that "knowledge" is achieved, how it is documented and disseminated. It's no use metal detectorists ripping up all the archaeological sites in their reach if they do not them responsibly report what they find to the Portable Antiquities Scheme. That is not "knowledge", it is just unmitigated destruction. Neither is saying so any form of "sensationalism" it is a pefectly rational observation. The writer of those anti-archaeological words however is unlikely to be able to articulate why not. They never can before they get aggressive.
I think many archaeologists are also passionate about what they do and what it means.