Don't get me wrong, i am no hippy and i'm a petrolhead, but what you're saying is basically that we should bury our head in the sand and hope for the best.
Your quote conviently forgets to mention that the resolution of the data for the last 650,000 years will not show short term (eg less than 4000 year) fluctuations due to the data resolution.
As such a peak like the one we currently appear to be in (200 years of rapid growth) simply wouldn't show up in the data, and as such no good scientist would claim that it is unprecedented, the evidence simply isn't there to make that claim.
Unfortunately, it seems good scientific practices and appropriate caution and climate change science frequently do not go together very often.