I'll argue.... a high volume pump doesn't appreciably increase the strain on the cam chain and cam sensor when clearances are right......cause the volume pumped at a particular pressure is the same as the std. volume pump.
I see where you are coming from. You are saying the load is there when you add the volume (at pressure) going thru the engine + the volume (at by-pass pressure) going thru the by-pass is greater on the HV oil pump as compared to a std. volume pump. I had not considered this.