I think the issue is that walking across the town to Cain adds like 3-4 seconds to someone’s speed mf runs. They want to complete a mf run in like 46 seconds, but walking to him makes it 52 seconds. They NEED to maximise their loot per second played to the absolute apex, so having the extra 30 feet of distance is a travesty.
Thats the only thing I can think of as to why it would matter at all for such an insignificant change. Cain is what, like 4 seconds of walking from your stash and 3 seconds from the WP? Maybe 5 seconds of walking from a TP? Not exactly a catastrophic, apocalyptic, game breaking bug.