Not really, autonomy is probably not the way to go.

One could easily drive all trains remotely, like kids playing with a toy probably since electric trains exist.

We still prefer human drivers all over the world, except for some systems. Those need to be very small or closed to be safe enough. Having a driver and personal has many advantages especially for unforeseen events. Autonomous vehicles may have the advantages in safety when nothing unforseen happens, but they can cause catastrophic chain reaktions. As critical infrastructure autonomous driving vehicles are an easy target, play them the right radar sequence and they will stop moving or endanger others.