I'm not sure what your point is here. It's well-known that green coconut vendors are very common in India (https://commons.wikimedia.org/wiki/File:Tender_cocon

I'm not sure what your point is here. It's well-known that green coconut vendors are very common in India (https://commons.wikimedia.org/wiki/File:Tender_coconut_vendor_in_India.jpg https://commons.wikimedia.org/wiki/File:Tender_coconut_vendo...). They have a cart of coconuts, chop the top off of one as you watch, and hand it to you to drink. As a tourist, it seemed to me to be safer than drinking water. So, to the original point above, coconut water is not waste, and is quite refreshing, and fills a useful niche if you're worried about stomach bugs.