I know that the stated reason is that so you can't bring the buffs with you to another world, but I don't see the reasoning behind it. In that case, shouldn't it be impossible to bring your golden delight and zenith to another world, too? Or just bring the buff stations wherever you go, however inconvenient that is. I don't understand why bringing one advantage from another world isn't fair when you can bring 99% of advantages wherever you go. I think PvP situations were mentioned, but the permanent shimmer buffs also exist and those are even harder to detect. Makes me wonder if there was some kind of bug related to it and they decided this was the easiest solution.
You can also bring Red Potion buffs from fortheworthy/getfixedboi worlds to other worlds, so this is even more pointless in comparison. If there's some technical difficulty related to the furniture buffs having infinite duration, a good enough compromise would be to just make their duration really high.