It needs challenged both from the gender perspective and also from the underlying culture of "reps" who have little to do with the folk on the ground.
There's lots that could be picked apart in your post (the RMT being misogynist for starters; it exists in a patriarchy so isn't free of that kind of thing but women hating? I don't see that as being specific to unions over and above the rest of society) but decided to just pick at the end of this nugget.
Who do you think reps are? Because this really demonstrates your ignorance here. You could argue that point about the executive and regional organisers etc, but reps? Reps ARE the people on the ground. They are workers who are granted time away from their duties for Union work. But they still have day jobs so know as much as anyone else about the day to day issues on the shop floor.