I live and work in NYY metro.
Majority of buildings in NYC 5 boro have electric wiring that are nearly 100 y-o.
Combined with modern electric appliances (instead of gas stove, heater or dryer) that demand more electrical load on the 100 y-o wiring.
I doubt these batter fires are to blame for actual cause of these fires in NYC.
You are far more likely to get hit or killed by cars on ebike than your e-bike battery catch on fire.
I have talked to firemen at the scene of the fire in NYC Chinatown,
I asked them what they think the cause of the fire might be.
Answer I got was old wiring in the building.
Sure, it's easier to blame the manufactures for poor products when you see reports from media that have never spoken to the manufacturer about their processes.
It's easier to regulate the manufacture than to educate the end users.
In the US, people seem to be demanding of manufactures for all things that go wrong with the product.
Regulated or not, if (ANY, if not most) product fail at the end user, end user is likely to have some responsibility to the failure.