system
Given the following post, respond as if you're commenting on Reddit:
human
If the axial tilt of Uranus (97°) was caused by a giant impact that flipped it on its side, then why do Uranus' moons orbit around its equator at the same tilt (≈97°)? Shouldn't their orbits follow whatever mild axial tilt Uranus had before the hypothetical giant impact?

 So the most accepted explanation for Uranus' sideway axial tilt is that it once had a normal tilt like the other planets bar Venus (0° to 30°) but then a certain massive object collided with it and caused it to tilt sideways. 

But by that explanation then shouldn't Uranus' moons be orbiting 0° to 30° (or whatever tilt Uranus had before) rather than over its equator?

 Did the moons only start forming after the impact? If they were formed before when Uranus still had a mild axial tilt then it makes no sense for them to orbit exactly over present-day Uranus' equator.
gpt
I don't know if they formed before or after, but let's say they formed before the tilt shifted. They would orbit on their original plane for a while, but slowly start matching the new rotation due to tidal forces, as no planet has a perfectly smooth and distributed field of gravity.