Is the Wings of Theve legend propaganda?
Yes. The original legend is presented as an FCU morale campaign built around Rex, whose exploits were exaggerated.
Confirmed explanation
After Rex dies, the player is asked to assume the identity so the symbol can continue. The story then tests whether the invented hero can become a genuine source of hope through the player’s actions.
What is not confirmed yet
Who authorized the campaign and how the public learns the truth remain undisclosed spoilers.