Of course in many ways she is right. Spotify is not run by the artists or record labels. It is an entirely different entity, however the question could be framed in a different way. If artists such as Swift are withdrawing from major streaming services like Spotify then what are they suggesting is the alternative?
All U2 and Apple needed to do was ask - to invite people to opt in. Then what turned out to be a PR nightmare for Apple could have been a coup. Thanks, U2 fans would have said. The rest of us meanwhile would have nodded in appreciation at the idea, hoping that it would be followed by a similar deal from Megadeath or Michael Buble depending on our tastes.