HV oil pump vs Stock oil pan

Rat Bastid said

So which is it? You said there was a 5 psi drop in the system and I said no, it’s much more than that. And it is. Damn dude, get it straight. Running that low oil pressure at idle starves the rockers and cam bearings. Most guys on here don’t build dead stock stuff. As the spring pressures go up, the loads on the rockers and cam bearings go up. You loose way more power with the cam sitting on the cam bearings and the rockers grabbing the shafts than you do running 30 psi hot idle pressure. Pressure is resistance to flow, so you also have a flow issue. I just watched a UTG video this morning because it was sent to me and he said the same low oil pressure nonsense.

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Dude, application and particular components. Street, HP/occasional strip or race. Street rockers and some HP will use stock rockers, maybe with brass bushes or steel on steel. But valvetrain loads will not be real high. This includes spring pressures and ramp acceleration rates. High end HP and race likely use rollers lifters and rockers.
As I stated previously, oil pressure is a balance between the oil pump flow volume capacity and the restrictions down stream. Those restrictions are the oil filter, bearing clearances, lifter type and rocker type. Maximum oil pressure is controlled by the pressure relief spring and valve.
Modern engines are designed to run thinner 0/20,5/20, 0/30 oils. The manufacturers also generally recommend synthetic oils due to better lubricity with tighter clearances.