You've already backtracked on this, does he have one punch power or not, or is it the 'pure' that's hurting your head?
The claim was that Whyte did not have one punch KO power, I didn't see any claim that his power was particularly special or rare.
You're right we don't describe most heavyweights as having pure KO power, mainly because they haven't demonstrated it on a decent level, or don't have the tools to ever land that power cleanly.
Neither of these things apply to Whyte, who dropped granite chinned Parker and recently KO'd Chisora clean with one punch. He should be considered a dangerous puncher because he has a signature shot that he knows how to land, and when it does land, people get hurt.
I'll agree that Whyte can obviously punch and it's not beyond the realms of possibility that he could stop AJ, but it's such a small chance that it doesn't warrant much of a discussion.