My point is to acknowledge the relative lack of representative sample outside SENA as a legitimate blemish for Hadlee.
Let's exclude Imran for a second and look at non-SC bowlers, excluding minnows:
Marshall: Three tours of England, two tours of Aus, three tours of Pak, two tours of India
McGrath: Three tours of England, three tours of WI, three tours of SA, three tours of India, three tours of Pak/UAE, one tour of SL
Steyn: Two tours of England, three tours of Aus, three tours of Ind, three tours of Pak/UAE, two tours of SL
Hadlee: Five tours of England, four tours of Australia, two tours of India, one tour of Pak, one tour of WI
So as mentioned, Hadlee is imbalanced in his record and only has one quality tour outside of SENA worth talking about.
Bottom line is that the 84 WI series was below worldclass standards, not really by average but by wicket-taking penetration. And they were the strongest side he faced so at best he can claim to be unproven there, unlike say McGrath or Steyn in India. Again, just a minor blemish but we have to acknowledge it.