Myth. It won't wear it out. In a properly timed gun, the extractor is under relatively little stress. In some guns, that stress is practically zero, as there are a few 1911 and Hi-Powers around that will function surprisingly well without an extractor.
I haven't seen any of the new Wolf pistol ammunition, but the older stuff was hard on extractors because of the short, sharply angled extractor groove...and that's not a myth. That's a fact.
When the extractor nose is bearing hard against the forward portion of the groove...the angled part...the case slams hard against the extractor when the gun fires. This condition isn't present in all guns as the specs and tolerances stack up differently...but it's certainly present in a good many.
Insert a case under the extractor and use a dowel rod through the muzzle to press it firmly against the breechface. If the extractor blocks it from sitting flat...it's gonna take a hit when the gun fires, and a broken hook is a certainty. It's not a matter of "if" but "when."
cheers