The thing I find the oddest about the proportionately high number of people having issues with hyd roller lifters in bb mopars is that......... it seems to happen proportionately less on bb chevy motors.

I rebuild a lot of BBC marine heads, and probably 75%(or more) of those are being run with hyd roller cams, and there are very rarely any lifter failures that we encounter.
Many of these use cams in the .600 lift range, and are using 1.7 rockers, which results in the lifters seeing even higher loads(spring pressure X rocker ratio), and they seem to hold up just fine.