I see how, the problem with pilots, unlike other forms of disputes (where members meet en mass) is the fact that most of you are all over the globe and cannot be brought together.
Granted you may chat in the f/d but does your F/O or Captain share the views of yourself?
Airlines are astute at splitting up union members on flights.
Taking action via union membership is comparatively new to pilots, unlike disputes of the past such as coal miners and building workers. This is new to you! And I fear BALPA haven’t the balls. Reps/shop stewards in the old days would stand your corner.
As to date, the divide of bases in the loco brings to mind the working practises of bus companies such as ‘Stagecoach’ (take notice) wages and working times were ‘singular’ to each depot, no collective agreements.. Be warned.