I’d guess it could be an attempt to use automation to try to improve the constant, hugely irritating “plants in cultivation not indicated as such by OP” problem, by assuming that a species that’s usually found in cultivation in a certain area, actually is in cultivation. Perhaps the instances of valid contradictions of the “not wild” assumption are few in number compared to when this assumption is correct, such that it’s more efficient to put the onus on the OP to explain when it is NOT in cultivation?