I think the problem is with the varying interpretations of "rapidly"; going from little or no background to an expert in a field might be "rapidly" done in 10 y

I think the problem is with the varying interpretations of "rapidly"; going from little or no background to an expert in a field might be "rapidly" done in 10 years if most people take 20. The problem (which I agree exists) arrives when people fail to realize that even extremely rapid conversion of intelligence to knowledge does not make you an expert in many fields without years of fairly dedicated study.