I don't doubt that 90% of crew did agree to protected industrial action in the survey. But it's probably on the basis of if nothing else works then let's give that a go.
Of the crew I know none have said they will strike. They believe the base is a forgone conclusion. Unfortunately with the Thai and Kiwi basings already there it doesn't leave much room for the argument against. The cap is the issue not the base itself.
It will be interesting to see what comes of it all in the end, hopefully an amicable ending for all involved.