For decades batteries were replaceable, and now they are not. If it were true that OEM are more responsible with batteries, then we should have seen a massive decline in lithium battery caused fires. We seem to be observing the opposite?
Maybe rigid replaceable batteries, lile the ones found in cameras, are actually safer and better protected!
Secondly if this is a genuine safety solution, then it should deal with laptops, cameras, electric bikes, drones and other devices that have much larger batteries and which are user-replaceable, and where they have to be.
Thirdly, an unreplaceable battery turns a durable good into a throw-away device. Then it becomes e-waste and might kill more people through lead poisoning than it ever could from a minor fire.
No, it wasn't. That was Galaxy Note 7, which was a different phone.
(I still own and use a S7, btw.)
This is far from the only incident of li-ion batteries exploding on aircraft; indeed the FAA estimated that li-ion batteries exploded at a rate of once every ten days on US-controlled aircraft in 2017[1].
Terrestrial lithium battery fires are at least as frequent[2] and have been far more destructive[3]. Given that litihum battery fires have burned down houses, it's only a matter of luck whether one eventually starts a wildfire or not.
Given the established risks of even OEM lithium batteries, making it easier for the public to use lithium batteries of dubious origin and quality is not prudent.
With specific regard to wildfires, I take it you don't live in an area where wildfires are a serious risk. Open flames and other sources of ignition, including cigarettes, vehicles, and camp stoves are banned in wildlands during fire season. If cell phones exploded more regularly, they would, by necessity, be added to the list of prohibited items.
[0] https://www.bbc.com/news/technology-37570100
[1] https://www.consumerreports.org/product-safety/whats-behind-...
[2] https://www.abc.net.au/news/2020-08-07/lithium-batteries-in-...
[3] https://loudounnow.com/2020/08/23/faulty-lithium-ion-battery...