Being able to buy a passholder-exclusive item is just as much an exclusive perk as being able to use the Club Lounge while staying Concierge Level, or using the services of a VIP Tour Guide. You want the perks, you should pay for them. If you can get the item without being a passholder, it diminishes the value of the exclusive perk, and by extension, the value of being a passholder.
And I don't have a money tree, but I believe in entitlement where entitlement exists. Passholders can buy exclusive merch. Non-passholders can't. Furthermore, passholders who enable non-passholders to obtain passholder-exclusive merch are helping to damage the value of being a passholder.
I told you you wouldn't like my opinion, but that's the natural order of things here in America.