This seems like a reasonable conclusion. I was thinking the author was trying to play it as safe as possible to not only be fair to Amazon but also to prevent t

This seems like a reasonable conclusion. I was thinking the author was trying to play it as safe as possible to not only be fair to Amazon but also to prevent them from having a way to blame anything else but their product or service, however your conclusion seems reasonable for not just the author's motivation but also worth considering in general when dealing with products that protect us or our belongings.