It’s not a straw man at all. It is the definition of distraction to even be discussing an edge case of water consumption. You can completely eliminate all bottled water and it will not make a dent whatsoever in any problem that matters.
Bottling water is okay! People need to drink water, bottling water doesn’t use that much water, and convenience is good! We should recycle the plastic but that’s a separate issue altogether.
More proof that the biggest threat to the environmental movement is environmentalists.