I'm a fan of SpaceX but you're wrong.

SpaceX is standing on the shoulders of what NASA and other space agencies have been doing for decades. Government agencies spent billions of dollars developing space exploration and SpaceX is able to use that knowledge to cut costs and take the next step.

It doesn't need to cost billions of dollars to travel into space anymore.

No, NASA spends billions to send laboratories weighing a metric tonne to Mars to send you pretty pictures. Even with insane risk aversion NASA carries out dozens of missions a year and support a lot of critical infrastructure.