It's a pretty reasonable concern I think
We all know that EV's are so much better for the environment than burning fossil fuels but there is a question around fires with the batteries that cannot be ignored and needs to be addressed as development continues
What I am trying to say is that in future to be able to ship EV's the battery design has to be safer, ie progressing to solid state batteries is a natural progression.
Not only from the point of performance, but also from the point of safety.
I haven't bought an EV as yet, simply in my eyes the performance for me doesn't meet what I want from a car.
But that is not the issue here.
The issue here is safety and people will be forced to do things safer.
Yes solid state batteries are more expensive, still in early stage.
However Insurance companies are in future not going to cover car carriers full with cars with lithium ion batteries, the way it is done at this very moment. It is obvious that this will happen.
Same thing happened in 70's after a couple of tanker explosions and investigations, made people realise what was going on.
The result was that Inert Gas Systems became a standard piece of kit on tankers, to be used to maintain a positive inert atmosphere in the cargo tanks. Being it a lean or rich atmosphere, but outside of the explosive range, especially during certain operations.
Insurance companies simply will not cover ships, if the risk is too high.
Government regulations go hand in hand with Insurance Companies' rules.
ABS, Lloyds and DNV insurance companies' rules are in general stricter than Government rules.
Something similar will happen with Car Carriers and Car Ferries.
Cars on trains being transported through tunnels, like the Chunnel will be looked at in the same light.
Incidents/accidents do happen.
People learn to walk by falling and discovering that that hurts, at the end of the day it is better not to fall.