I agree with that. The Phantom train just is.
In a way, the train would take all the departed, but if the train didn't exist via magic/espers, then in technicalities people couldn't die because they couldn't be departed to the other side. It'd be like that family guy episode with death.
Point is, I think the train is a higher power of it's own, I think it exists because humans exist, if there were no humans to die, then it would have no reason to exist and it's existance would end.![]()