One of the reasons behind only being able to equip one gold armor and one gold gun is to further develop a balanced character, multiplayer and campaign. If you are limited to one than that is going to leave you to finding out which combination works best. Its like having an ever changing way to build and customize your character beyond the subclasses and its one of the things that creates a higher replay value. If you can binge on destiny till your fully gold-out, then how many hours beyond that point will you play? Most people will be like "I've done it all" and move on to other games. However, having the gear drop more limited and making it to where you have to balance your character with select gear opens up a higher replay value in learning the difference between all that gear and changing the way you think and play. You can have all that equipment in your inventory and swap out pieces for ones your wearing, giving up something great for something else great. Think of it like swapping between your rocket launcher, shotgun, and sniper. They are all great weapons but perform completely different, if you could equip them all at the same time than there is no planning needed for the raid to come, the raid looses part of what makes it challenging, and there is no longer a specific role you are playing. Because there is no specific role, there's no reason to go back and do it playing a different role for a new experience. I know you could always swap out 2 different gold helms if another dropped (for example) if you were completely decked out in gold, but what they are saying is "if we limit this and make you choose we are presenting you with more playing options with a limited set of gear" vs "developing more gear to keep people playing" which would be a constant development project making new gold items that would eventually lead to older golden items not being as awesome as newer golden items. Thus defeating the whole idea behind them all being something epic.