[Final Destination] Death is the one who sends the visions to the protagonist because for them only to survive.

This was basically revealed somewhat in the atrocious fourth installment that yes, Death is behind the premonitions but I was thinking, "why though?".

In doing so, any of the survivors who were intended to die in these horrific disasters end up escaping their fates and thus, the events of each movie proceed to happen with Death picking them off one by one.

Well, what if it's because while what Death initially planned always starts off as intended, it immediately goes south. Death sends the vision of the impending disaster to the main protagonist of each movie because he intends for the person who has it to survive, to escape their fate, to basically cheat him.

However, it's just that one person and that person only who is to escape death. Not everyone else.