Definitely not comparing to coca leaf use. To your point though, refined THC in the form of hashish has a much longer history than refined coca leaves. As has breeding for more THC.
Hashish does not actually have to be "refined" at all. There's zero chemical process involved. You're just taking the resin glands off the surface of the plant. Refining cocaine is starkly different from this, of course.
Not unless you narrowly restrict the latter to refined cocaine, while not restricting the former to (say) refined THC.
The history of cannabis use is not orders of magnitude longer than the history of coca leaf use.