So whilst voting yes and then working might shield individuals from specific BA sanctions, the uncertainty caused and potential loss of business elsewhere is still a risk that the members should consider.
There is only "uncertainty" if strike dates are announced. Now, since BA have the bases pretty much covered with VCC, mixed fleet, those who have resigned from Bassa, etc, and the fact that previous strike action has not only failed to "cripple" the airline but has not resulted in a massive drop off in bookings then, imo, the only people who should be "uncertain" regarding the future are those who believe that a strike will somehow advance their cause.
As we have seen, striking and the threat of strikes has no effect on BA's resolve. The dispute is effectively over, Bassa have failed to impose their will, have failed to get the public on their side and have failed their own members. They are finished.