When to worry about engine noises?

The springs are always loading the cam with open & seat x 16.
That's a lot and yes the bearings trashed/ excessively worn indicate starvation or low psi. Hurt/spun/plate loss1st? Not always n depends on the range of use/rpm. Cam bearings will hang in there longer than a rod, one can go partially and all thatsbeen is a slight loss in oil psi...still have 4 more.
I run std pump. I used to think like most including dude above that hv pumps ate too much power... till I saw the engine master test.
That said... I still run the m72 std pump.