The point of a fully reusable launch vehicle? Similar to a fully reusable airplane or a car, I suppose.

We have various interests in sending things to space, why not do it cheaply?

Survival of our species, for one. Never the mind short-sighted folks like yourselves clawing us back the entire way.

Just to Mars, and maybe the asteroid belt. See [0].

[0] Expanse, The.

To export the enjoyers of capitalism (a.k.a. humans) outside this planet, to visit the stars.