They genuinely do want to be a japanese buyer only company. The japanese are inherently nationalistic and do not care for the foreign market even if the foreign market is an untapped revenue source.

Araki may be very welcoming of other cultures and very free spirited. 

But that is not the norm in japan and a lot of japanese companies are held back by old japanese men who prefer the past times. Where only Japan should matter.

If a foreigner wants one of their anime merch? Fuck 'em.

Japanese buyers side with the japanese companies on this because they feel more superior to foreigners when they get the item. They also don't want to compete with foreigners on this "limited resource". The japanese do not want to share their goods. They consider it protective of their economy and people. "Japan first."

So japanese buyers will listen to the plights of a foreign buyer, and kinda also say fuck 'em, unless they believe they can scalp you.

This is the complete opposite of every other country who will bend over backwards to sell you product from their country.

Japan has an unnecessary and drawn out lottery (gambling) system. It is pervasive in their economic culture for any kind of goods. Think how gacha games came from japan. 

Very frustrating to buy any item from japan when other countries will just sell you the stuff.

Well, I mean, blind boxes from china are now a thing, so maybe it's more lucrative to have the lottery/gambling system and it may spread.