"Under most conditions you will never lift the bypass"
The bypass in an oil filter is lifted all the time. When the engine is cold. When the filter is to dirty and when the motor at high at high RPM. Unless you have a special race filter or a system specifically designed to never bypass your pump or filter will.
An oil pump can generate many GPM of flow (exact would depend on RPM and displacement of the pump).
It is proportional to RPMs (if you can show me how a bypass can lift with the system at 0 psi let me know).
And the relief valves in the pump/block will lift at an absolute PSI.
