Camshafts and Compression

I ran a set of Rhodes long ago but not sure if they made a difference.
Now that I understand more about engines I wonder how do they know what the individual engines oil pressure curve is ? And some engines will run low idle pressure but high pressure further up in the rpms. Then you have high volume vs low volume pumps to consider . Then there is oil viscosity. I don’t think you should select viscosity based on what Rhodes lifters want .

And after reading this post I wonder what the point of them is at all …. If your running a big cam you probably have high compression and will run into exactly the issue OP has . If your running a small cam you don’t need them .