Do you have the same feelings about radiation therapy for cancer?
Then again, the stuff shows benefits in trial, and presumably we get most practitioners trained up and doing the thing that's the standard of care well enough...
But in practice people just take two 500mg tablets and call it a day. Works well enough most of the time, even though it might be 'wrong' in some platonic sense of the word. (Eg you might have been helped enough with a slightly lower dose. Or perhaps 1250mg would have been better and suppressed slightly more of the pain. Who knows?)
I'm just not sure what the margin for error is, the failure modes for this magnetic therapy, or what makes a good magnetic therapist.
Not a reason to stop developing it though.