I'm not sure what Essiac does to extend cancer survival, and for all we know it may not have this effect. On the other hand, it's not toxic and my patients have reported feeling good while taking it, so why not support them?
Either one is factually equal, and consequently morally equal as well; on the other hand, if one is morally equal, there is no reason why one should contest factual equality of rights or simply refuse to grant them.
The question "What shall we do about it?" is only asked by those who do not understand the problem. If a problem can be solved at all, to understand it and to know what to do about it are the same thing. On the other hand, doing something about a problem which you do not understand is like trying to clear away darkness by thrusting it aside with your hands. When light is brought, the darkness vanishes at once.