I wish I had this low failure rate on all of my suppliers....this is phenomenal.
Ask any industrial statistician.
But then, common sense is no longer common, and the forces of niceness must prevail.
This was reported fires ... I would guess that the number of melted tubs is at least 100X higher ... I worked for a printer manufacturer back when they were switching from class “B” to class “A” power supplies ,, we had 2 fires and thousands of melted printers.
As others have noted, the issue isn't failure, per se, it's the mode of failure and consequences. When the consequences include house fire and from that, potential death, it's prudent to take design measures (if available) to prevent that .007%, even though it's a small percentage. Especially here, where there is no misuse of the product; contrasted with automobiles / accidents.