As Moira said, that's a big part of it. And, with psionics, there's the added hesitation where she has said, quite decisively, that she will not allow us to use our powers to lessen the cravings. Ethically, ignoring that would be much more invasive than any other solution we might come up with.

The other hell of it all is that going cold turkey on any other sort of addiction involves a necessary purging of the system. But this addiction is directly related to her mutant power. I'm not convinced that actually fully purging the magical energy out of Amanda's body might not be even more harmful to her than simply the withdrawl.