You apparently haven’t read the article, and are commenting based on your opinion despite saying “opinions of vaping aside”. Battery failure isn’t the manufacturer’s fault, it’s user error.

This. I can’t believe the author missed this one, it’s the most important point and one of the leading causes of battery thermal runaway. Uneducated people will just carry spare batteries in their pockets with the terminals unprotected, making them prone to short-circuits. Short-circuits = boom.