As I like to work on my own vehicles I have asked some safety questions about my EV, the response was don't tinker just carry out checks as detailed in the handbook
If it's involved in an RTA there is a pyro device (like airbags & seatbelt tensioners) that will completely cut the battery feed cables safely, this is housed nr the underfloor battery bank so all the electrics onward from this will be dead, the battery contains no liquids, but I appreciate it has chemical components that could contribute to a fire, let alone the high voltages used
Of course ICE vehicles contain plenty of flammable substances and Sulphuric acid, but they've been around for years so we know to be careful with them & probably aren't as concerned as they are familiar
240 volts in your garage will kill you if not respected, some paints & solvents are extremely flammable, remember old fashioned Nitromors !, risks just need managing appropriately