I suspect you haven't read Taylor Swift's letter, and I suggest you do. It's fairly short.
Ok. I have read the letter. But my original point still stands. The only reason Apple bothered to do anything was because Taylor Swift said it.
To come to your point. I don't completely buy the whole "Think about the indie artists!" angle either. She herself says that pretty much everyone she spoke to in the industry (she used the word "social circle") was displeased with Apple's system. I am pretty sure there is self-interest involved. I am also positive her record label is happy with the new arrangement as well.