As a non-streamer it does not affect me too much. I look forward to downloading and owning whatever music I like. What really gets me is that there is still restrictions by country and there are songs that if I want I have to pirate because they are not available in the US iTunes store, but in the UK or other country iTunes store. This practice drives piracy and the labels need to get real. also giving away the videos through youtube means i don't need to buy or even stream. Labels just don't get it.
I can appreciate the sentiments, but this is a reflection of a situation that pre-dates the existence of recorded music. Rights to distribute books, music, movies, videos, etc. are sold/licensed on a nation-by-nation/region-by-region basis (my company once had a distribution contract with a Canadian firm that covered all Canadian provinces and territories
but Nunavut - they weren't willing to promise they could profitably sell our product in that particular locale). Copyright laws vary on a nation-by-nation basis. For physical media, this kind of piecemeal distribution was (and is) necessary - physical goods require a physical presence, and in many cases, to have a physical presence, the law requires a separate corporation that is registered (and paying taxes) in that country.
Part of it is just plain common sense - a locally-based business is generally in a better position to efficiently reach the wholesalers and retailers who sell in that market, to produce consumer advertising and promotional materials that resonate in that market, etc. And all but the largest companies simply do not have the resources to do all of this on their own - rights are often licensed at a fairly low price to local publishers and distributors, because the costs and barriers to entry are far higher than even the most optimistic profit projections allow. A fair amount of the business that goes on at publishing industry conventions has to do with the licensing of international rights.
Internet vendors like Apple and Amazon have to deal with the laws that are in place, as well as traditional deal-making practices. If, say, Adele's management makes an exclusive deal with a Russian distributor of online music (for sale to the Russian market), then Apple and Amazon can't sell Adele's music in Russia unless they buy it from that Russian distributor. If local laws ban the sale of a particular kind of media over the Internet, than the iTunes Store unit that operates in that country isn't going to be able to sell that kind of media. And so on.
The Internet can present the illusion that we live in one world, but that world is fragmented by language, custom, the desire for local rule... Territoriality is a trait that's nearly as old as life on Earth. And iTunes Store operations reflect that reality. Apple's fault, if any, is in the decision to operate world-wide and to abide by local law.
As to Adele, Taylor Swift, et. al... These are experiments. Artists and publishers are searching for viable, profit-making strategies in the face of change. They're taking their cue from time-worn practices in book publishing and the movie industry - withholding the product from the less-profitable forms of distribution during the initial release period (hardcover-only during the first months, followed by trade paperback, followed by mass-market paperback; first-run theaters followed video-on-demand followed by DVD/Bluray/digital download sales, followed by rentals, followed by pay-cable networks like HBO, followed by network television....). In many cases, a few months of piracy will only build interest in the legal editions of the work, once available.