How much experience do you have of actually working trains?
None whatsoever. But from 1986 (when DOO was first introduced in Scotland) until 2016 I worked in a operational role for the railway, in Control, part of whose function is the recording and investigation of safety incidents. And in my experience moving to DOO made no difference whatsoever to passenger safety. I would however absolutely change my view when, or rather if, statistics proving otherwise are presented, the fact that they have not speaks volumes.
It’s notable that in many areas (most recently Scotland) the eventual consensus has been to continue with a method of working that includes traditional guards.
Yet there has never, to the best of my knowledge, been any suggestion or demand from the Unions, that the many DOO routes in Scotland should return to full Guard operation.
I refer to the example I have posted elsewhere of trains from the same terminus, Glasgow Central, entirely under the control of the same signalling centre, West of Scotland, using identical stock, Class 380, to two nearby places, Neilston and Barrhead; One service has been DOO for over 30 years but the other must have a Guard, Scotrail seemingly having backed away from a confrontation with the RMT. That situation is a nonsense.