The reason I asked this was because a strike over potential redundancies is something I see as potentially detrimental to progression of the industry, like advances in technology, etc. Similarly to how self-service checkouts replaced a lot of manual ones in supermarkets, and ticket machines replaced many offices, trends and improvements in technology do make human jobs redundant, which is one way of the world that if prevented could hold us back.
(1) the primary reason for a union is to represent and protect their members.
(2) the RMT union is pro public transport, hence them encouraging more public transport (including busses) and increased spending (including investment) on public transport.
(3a) there are a number of factors with regards to safety. First is the safety of staff. If there are two (or more) staff on a train, that’s better than only one. As they can, if need be call on each other for help.
(3b) a person in the train in addition to the driver helps the passengers feel safer, and in practice does mean that there is less likely to be any trouble on the train. Hence could be described as passenger safety.
(3c) a safety trained guard (or equivalent) has a primary requirement to ensure not only the safety of individual passengers, but also the whole train. That includes dealing with any accident, incident including using whatever means necessary to protect the train in the event of a crash, derailment or any other accident or incident.
In regards to 3b, I’ve certainly been on trains where the guard (or equivalent) has had to enter a carriage to take control of a situation that could have got nasty if it had been left to escalate.
In regards to 3c, if the train hits an object, a guard can assist the driver. Be it helping to move a small fallen tree, or branch, or helping the driver to identify damage to the train.
In addition, if there is a problem with the train, e.g. a problem with the doors, a guard and driver working together are more likely to fix or overcome the problem.
In which case I'd pour scorn on the former but have more sympathy with the latter.
Whatever is genuinely essential to the industry is not going to be at risk. If it's planned to be made obsolete, it can't be essential to the industry.
So taking this further, in maybe ten or twenty years time, if technology advances far enough that androids, AI and other technology can replace humans in the vast majority of jobs and professions, how are people going to be able to earn a living?
Plus do you really want a world where you hardly ever interact with other humans, where absolutely every service or retail outlet is all completely automated?
In other words, people may find themselves obsolete.
Will people miss having a friendly chat and passing the time of day with employees as the go about their business?