I know you didn't but that's what started this thread and I don't want to lose sight of that.
I agree with your first statement except to say you can have leaks and no flow or severely restricted flow.
Everyone is so convinced that rod bearing failures happen because the oil is moving too fast down the oil gallery and that's just not true.
What kills the 3-4 and 5-6 rod bearings is the fact that we are stealing oil off the 2 and 4 mains to feed the rockers and shafts. And the issue is far worse with a roller cam because all of them have a groove around the 2 and 4 cam bearings to give them full time oiling.
That's what kills the rod bearings. That and RPM. And I suppose (as I can't prove it yet) part of that is the pump is on the bypass at some point and even though its on the bypass it can't put enough oil out to feed the rod bearings at high RPM because of all the leaks at the rockers and adjusters.