In theory, it is designed to be resistant to being partial to any one side. And is pretty decent at it. However, being a social system it can be gamed, and sometimes is gamed.
Community notes are not impartial, they are written and approved by the users who sign up to do so (and actually take the time to do this unpaid labor).
Thus, they tend to reflect the biases of the kind of people who most want to (and have time to) write and approve community notes, drawn from the pool of people who use your site.
Yes, it's not difficult to get out of. You could also get out by saying that you don't trust the police, or any number of things that might affect your ability to be impartial in the case before you.
It works quite well in practice. The unapproved notes are a bit all over the place in terms of bias and or being wrong but the ones that get enough votes to be shown are mostly fairly factually correct.
Yeah, if only a pedestrian or a cyclist or a regular person who isn't out of their mind would "stay in the right lane" and let me go vrooom vrooom, then we would be satisfied! /s
It tries to make the claim that Japanese house building is for some reason superior when in reality its just shoddy construction turning an appreciating asset into a depreciating one. If the house value stays flat then that's unusual, they usually lose value over time.