My point for years - ever since Star Trek.......at that speed, there would be no way to avoid a random asteroid, planet - or even a star.....it would be suicidal.
It is inconceivable that any automated guidance system could be devised to steer around objects at that speed. In fact, a course adjustment required to do so might just kill everyone in the ship due to momental inertia.
But then - it was once inconceivable that man could fly, or go to the moon...........
In Star Trek they didn’t go around objects in their path, they had a “Navigational Deflector” (force field thingie) that pushed material out of their path.
The big dish on the front of the Enterprises secondary/engineering hull wasn’t a radar dish (as a lot believe) but an incredibly powerful deflector designed to push objects out of the ship’s path.
The theory being that if you have the technology necessary to produce enough power to warp space allowing exponential increases in distances covered beyond the speed of light, you can also produce a deflection field capable of pushing anything up to decent sized objects out if the way.