>Like really? As if we cracked all the secrets of the universe.

We don't need to crack all the secrets of the universe, just some, and then we build from there. As far as we can tell FTL travel is impossible. For that to be incorrect would mean some of our most well tested and supported theories are also totally incorrect.

That's just not at all likely, because yeah, they're really well supported. FTL travel just doesn't make sense with the rules of the universe as they are.