re: Do you believe in the Fermi Paradox: The Great Filter?

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The fact that 2 cars can theoretically hit head-on but go right through each other without touching is mind blowing enough. But being theoretically possible to teleport could be a game changer in interstellar travel.

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You misunderstand this.

It's true that subatomic particles do something like this, in fact it's becoming a major problem for transistor manufacturers. Particles will simply "tunnel" through a barrier.

But even that isn't quite stating accurately what is happening. A particle doesn't really have a position, it has a probability function that describes the likelihood of it's position if one measures it. That probability is slightly > 0 for certain subatomic particles in transistors.

But keep in mind that this is for a single tiny particle jumping a few nanometers across a barrier. For large objects (like cars) jumping meters past each other is another matter. That probability is so small that for the lifetimes of billions of universes it still isn't happening. It's greater than zero, but so incredibly tiny that we can confidently say it just won't happen.

And "teleporting" across interstellar distances is even less likely than that.

Source: Got my degree in Physics and Astronomy and spent far too much time doing homework calculating stuff like this. For subatomic particles yes this is a thing, anything larger and no it isn't.