Amazon knows that people read in the bathtub and want to continue doing so in the age of ebooks, which is one of the main reasons why recent Kindle generations

Amazon knows that people read in the bathtub and want to continue doing so in the age of ebooks, which is one of the main reasons why recent Kindle generations are advertised as waterproof. You misunderstand the risk involved; a sealed low-voltage device is not a toaster connected to the mains.