It's adherence to safety regulations that's stopping your house burning down at the moment and this responsibility will be there regardless of how the code is written.
On HN, many seem to have interesting ideas about what goes on in the world of programming because they read HN articles and posts and thing everyone is adhering to the high standards advocated on here. It's not only enterprises though; plenty of startups (or small companies that are no longer strictly startups but not enterprise either) who are still running the code from the founders from the day 1 MVP. Held together back hacks and misery, deployed from version25_12_22_xmas_bugfix.zip.
The majority of electronics gets produced in foreign nations far far away.
Do you really think they obey the regulations?
and most of all, there's reputation. it still works
If we're talking about Kitchen Aid / Whirlpool / Samsung / LG / etc, they're going to design for certification and have them produced in the foreign nation to those specifications.
If you're getting random things on Amazon or Alibaba, they definitely may not be produced to those regulations, and you may be risking your insurance coverage if one of those is found to be the source of a fire, as I understand it.
That said, if some vendors are illegally selling products that _don't_ meet safety standards, I'd be doubtful of the GP's claim - that the reason they aren't burning down your house is because of the calibre of software devs working on the product.