You have a point in the potentials of MF; especially since t6 is not a challenge for most players, stacking MF and losing a few % of CDR and eDPS isn't really a problem. In the end it's probably difference in perspective and attitude.
I just find that rushing through rifts (usually without leorics and topaz socketed in helm) the more efficient way of getting legs. Especially considering leg rate boost relative to MF is only 1:10. In an experienced party, more CDR benefit more almost all the time (damage and movement) - drop sentry (in a confined room scenario, you barely have time to drop 1 before you move to another), dash more often, more wormholes, and etc.; for some gearing/builds you also take out the need for RORG, allowing for a gg set ring (like Endless Walk combo)/SOJ/Unity or even a gg Nagelring. Two sides of a coin.