As for A1 and A2 that is a matter of choice just as Ayurveda believes in cow and not buffalo milk as a better option.
There are many such essays on many nameless websites that are cropping up since many years just to debunk traditions .
And above all it is a local religio-cultural tradition and that for me is good reason enough. A local Tamil issue , even 4 district issue is good enough. The article means means that if one last tribe is left with 1000 people with beliefs should be forced to convert to their values ?