I've already mentioned the "issue" of wrong side door releases, which really assumes that people are morons. The driver has just driven along the full length of the platform and has, hopefully, been aware of the platform as they drive past it. Most train drivers have a memory greater than that of a goldfish, and should remember where the platform is.
But memory isn't even important here. I am no expert, but surely the procedure will be quite clear - the driver should stop and secure the train. Then, (s)he should check that the train is aligned with the platform by using the cameras or mirrors provided. Only when (s)he is satisfied that it is safe to do so can (s)he open the doors. Should they adhere to this, issues such as wrong side door openings and stop-shorts should be no more common than with a guard. If they don't adhere to this procedure, then (like a guard who made the same mistake) they would be negligent in their duty.
Besides, even if the driver did open the doors on the wrong side, us passengers aren't going to simply going to open them walk onto the other track like Lemmings.
The problem is usually when drivers are approaching red signals, or similar situations, at which points they concentrate (rightly so) on the road ahead, and not on the passengers on the platform.
As for your suggestion for checking that the train is correctly positioned and observing the side the platform is on in mirrors or cameras, that only works when the mirrors/cameras are platform mounted, as bodyside cameras do not function until the doors are opened. This is usually mitigated either by CSDE/ASDO systems where possible, or more often with a sign placed where the driver will see it saying "open doors on other side" or similar, as seen at the bottom of this railsigns
You also seem to have a confidence in passengers that quite a few others don't! Some passengers (especially when they have buried their head in a mobile device) do go into auto-pilot, and at stations where a train may be routed into a different platform most days, then there is a real danger of someone on autopilot and not looking out of the window to mash a door open button that has been accidentally released and walk out onto the track.