Swappable batteries are a huge fire hazard. They stopped doing that even for scooters. Too dangerous.
There may be safety concerns (e.g. if I understand it correctly, the swapping process is fully automated and the car locks the doors and takes over steering, so I'm not sure how this deals with emergency scenarios where the driver might need to leave the car or intervene) but as far as the driver is concerned they never touch the battery so the risk of accidents from improper wiring is significantly reduced.
Gogoro currently do more than 400,000 battery swaps / day, primarily in Taiwan, but are expanding into other Asian countries.
My point is it can’t be much more of a hazard.
I used a gasoline stove for a while and it is bonkers how hard that thing is to light. You can spill the gas or do all sorts of things—the only thing I could do to get a fire out of it was to follow the instructions, exactly, and keep the stove perfectly level. I later learned that gasoline only burns if you keep the gasoline / air mixture within a narrow range. I know that gasoline is implicated in a lot of fires, but it’s also just so damn common and people are careless with it.
Powerful batteries scare me more, to be honest. Not a lot more, just a little. Not trying to fearmonger here. It’s just that I love those sparks and that fire, and have spent time playing with batteries and playing with gasoline or other flammable substances. If you short a battery, it will basically dump as much energy as it can, as fast as it can. It’s easier to accidentally short a battery.
Properly stored & maintained batteries are fine. I just get a little nervous holding a wrench, sometimes.