Because even if a strike authorization vote doesn’t fool most Union members, it might still fool enough into thinking leadership lifted a finger to fight for members’ interests to influence the vote on the Contract.
And it’s probably something the Union would point to in some sort of dereliction of duty case/protest by TDU, etc. All for show when JH and DT are accused of having been bought from the beginning.
It’s why they quickly jettisoned negotiating committee members who would have actually advocated for membership.