Sorry desk pilot, but that is non-sequitur.
where does RAF pilots in the battle of Britain fit in to unionization?
your argument could equally be transposed, that if the RAF was unionized, the flight crews could have taken an elected position not to fly due to the personal risk.
Either way, it is a pointless analogy as military service personnel are not unionized and failure to act under command has it repercussions. Military service under a declaration of war is not comparable to commercial operations.
Democracy relates to a methodology of governance, not a commercial operation that exists to make a profit.