Exactly, which is why you need to take trains, not cars.
Everything else you said completely misconstrues the point, nobody is arguing for less train or car safety, or that this crash was fine. That's ridiculous.
But the argument that the relative risk of trains is far lower is, unfortunately, often used as an excuse to not take safety in absolute terms seriously. It's almost like saying: "Because trains are already so much safer than cars, the few crashes that still happen are just bound to happen, they're a fact of life we have to accept, and not worth doing anything about." (I am exaggerating, of course.)
But many of these accidents are in fact easy to prevent, even without huge investment in new infrastructure. So we should prioritize that and make our voices heard that we care about railway safety! And no, this is not a psyop to make people drive their cars more, that would be ridiculous.