None of which matters. Unions gain power by employers being crappy to their employees. These railroads have known this issue was coming for years. And they still couldn’t manage to say “hey maybe we should actually pay these people well, and not punish them for getting sick.” You want unions to go away? Treat employees like people. Notice the software industry, which completely coddles its employees, never unionizes. Good pay, good benefits, don’t punish getting sick or having appointments, no union. The math is simple.
Unions could not exist as they do presently without hard handed government regulation against businesses. They actually cannot survive as they once did...unions are dying because everyone...you included...avoids monopolistic power against you.