Not every country has a licence to sell certain movies. Literally can't pay the money the makers of the films what they want to charge me because they don't want to charge me. This also applies to music and other products (though other products can't necessarily be pirated).

My options are:

    a) Pirate the movie at no cost to the creator
    b) Do not watch the movie at no cost to the creator

That a small percentage of people can't... OK that's true. but bringing that up as a reason why piracy can be justified doesn't really seem conductive to a cross-discussion.

Good luck finding anything but the most popular animes legally in the US. I don't think I've ever even seen a Japanese drama through a legal means.

If a title is not available in a region, the copyright holder implicitly doesn't care at all. They care about piracy of their goods in regions where it's legally available for purchase. So sticking to arguments that revolve around that seem to make more sense, otherwise you are "preaching to the choir" as it were.

  c) Watch another movie, paying its creator
     (possibly the same as in option a)

You can't just replace "Vocaloid Music" (Miku, Rin, Luka) with "other synthetic vocals". It's "similar" but it is not "the same".

The cultures around Gumi and other Megpoids differs from that around Miku and other Vocaloids.

When a billionaire buys a Van Gogh or it is sold to some museum far, far away, we look at other van Goghs. If all van Goghs were to get out of reach, some other painter would be brought to the spotlight and become _the_ painter.

(And edit on my grandfather post: s/minority/majority)

That isn't how that works. Cultures get built around things - those things don't "choose" their culture. Even creators do not get to "choose" the culture their work belongs to. For example, Pepe the frog. Contrast the popular 4chan/pol/ usage of Pepe the frog with the viewpoints of the creator of Pepe the frog. Even the artist recently drawing Pepe taking a piss on Donald Trump won't stop or change the culture that has built up around the meme. Sometimes trying to not be part of a culture backfires. Ben Garrison learned that the hard way. The more he asked 4chan to stop - the harder 4chan pushed. Eventually it seems like he has given up fighting against it.

>When a billionaire buys a Van Gogh or it is sold to some museum far, far away, we look at other van Goghs. If all van Goghs were to get out of reach, some other painter would be brought to the spotlight and become _the_ painter.

I'm not sure what you mean by this. Not too big into art culture and don't really care if I have a cheap $30 copy or the $30mm original of the painting. If I wanted a van Gogh I'd get a van Gogh. Even if it weren't an original.