I think that's wishful thinking although there have certainly lost quite a few over this.
I also think that the recent final BA offer caused many of them to rethink why they got involved in this. Some may even have been left confused which is why I suspect many didn't vote.
Taxation of ST is coming anyway completely independent to this industrial action. We are now in Europe. The Europeans have have had a different view on this for some time and many countries already heavily tax ST. It is only a question of when and not if.