There is no such thing as 'western' science. There is only science which simply asks for reproducible evidence of whatever anybody claims. Anyway, from the article you cite:
And what the authors of the referenced paper actually say:
So yes, it's possible but it is the exception and the actual authors are a long way short of saying it could happen in "a lot of people". After all, they only found 17 instances of it.
Some actual articles on the topic relating to Mungo Man and his ancient relatives. Of course this is all 'western' science so please don't tell me it backs up or refutes whatever you have been saying about anything.
Mitochondrial DNA sequences in ancient Australians: Implications for modern human origins.
Ancient mtDNA sequences from the First Australians revisited