HV oil pump vs Stock oil pan

It's been proven many times that the hp thing is a myth, I also go by experience-my own as well as alot of guys much smarter than me. The argument seems to be if you can "get by" with something at the bare minimum it's good enough, that may work on a stock engine but when it comes to a performance engine it's a great way to find out the weaknesses.
Well, discuss the "HP thing" with the factories. They have the money and facilities to test these things and more. This be their finding.
As to a HP engine, that depends on the extent of modifications. As the build gets more extreme, more ancillary parts need upgrading.