Conan - a paradigm for FRPGing - survives being crucified in the desert!In the early 20th century there were not many Forever Heroes.
A lot of other pulp heroes survive too. Even in HPL's stories, the narrator is typically alive though perturbed and feeling threatened.
One of the most epic films ever made is Lawrence of Arabia. We, the audience, know he will survive the war because the framing device is his death in a motorcycle accident after the war. This doesn't make the rest of the film pointless.The PCs can't be killed or even harmed or even slowed down. Much of the game play feels pointless. Sure they take the "10 points of damage" to there character, but it does not matter. Even if the character had only 10 hit points they would just ignore it as no player character can die ever.
Obviously innumerable other examples could be given.
The idea that RPGing, even FRPGing, is "pointless" if the PCs can't die is just wrong. Fiction in other media doesn't depend upon the prospect of death to generate drama and tension. RPGing doesn't need to either.