Treating Cancer with AYUSH

Nowadays I am seeing a lot of parents who are opting to treat their children with cancer, with ayurveda and homoeopathic medications.Not just the illiterate ones, but also the super educated ones.Then they come back to us , with advanced disease when we can't offer them anything more. Is it legal for these practioners to offer treatment for cancer ? It's so heartbreaking to send children DAMA when we know they are going to die. All the efforts go in vain. Is this just happening in the BIMARU states or its the same everywhere?