There has been an ongoing attempt to find a way to mass produce "heroes". Constructs of various strength can be made, and mechanized limbs and body parts are also available. Theoretically powerful and artificial monster and demon hunters could be constructed and sent out in great waves to help tame the Interior. Although in test cases there has been some success, inevitably whole teams of such beings vanish without a trace.
On a paper there should be no such discrepancy in ability, but the costs are so high to re-create high level hero constructs that it is hard to test too often.
Some theorize that some wild Interior monsters seem to "scale" to the skill level of the heroes they face. If this is true, it is possible that they have no restrictions when facing against a non human "hero".
-The Adventurers Guide to the Continent