Seems counterproductive to design and manufacture a filter that would do its job in filtration, but when differential pressure is too high, the bypass opens and just dumps the debris into the exit passage.
I think the purpose of the bypass in the filter is in case the filter becomes plugged up you will still get oil into the engine by bypassing the filter internally. I may be wrong on that but I doubt it. I may not always be right but I'm never wrong.
