They needed to prevent any delays, such as fabricated issues in the hangar or the plane being pulled for no reason.
Their enemies could easily invent dozens of excuses to stall Hera's departure, only allowing her to fly once it was already too late.
They couldn't afford for that to happen, so Dave took the initiative to contact Xavier's family, using his name to request the favor, just as Luke had.
Xavier, understanding the gravity of the situation, didn't blame them for reaching out to his family.
In fact, after learning what was going on, he considered contacting his family himself for the first time in years, just to help Hera.
Even if it meant sacrificing his acting career and returning home to manage the family business, he was prepared to do it.
But since Dave and Luke had already taken the step for him, Xavier accepted their actions without hesitation.
