That is just false. You are trying to draw a connection where one does not exist.
I am very aware of the line Qantas had presented to the NJS negotiators from the very start of the negotiation. They were well aware that if agreement was not reached by a certain date then Qantas may choose to place the aircraft elsewhere in the Group. That date arrived and agreement had not been reached (I entirely blame Qantas as they were presenting a poor deal). Then Qantas did exactly what they said they would do and informed AFAP that they plan to take the aircraft elsewhere. They are not threatening to give the planes to SH and they didn’t say, “well SH reached an agreement and you didn’t so now you lose the jets”.
Qantas did what they said they would from the outset and a SH deal, or not, had no effect.
Even if the SH deal could somehow affected the NJS negotiations, could you imagine a union saying to its members; “Well we could have done a deal to protect your 700 jobs but we need to look out for pilots who fly for a different entity and are members of a different union, so we told Qantas to shove it”?