True. In my other commemts I linked to a couple of other studies, too, including one in London and another in Florida. The picture is pretty consistent regardless of where in the world you are, as far as I've seen.

You're definitely right that confirmation bias plays a part. Also, some ways motorists break the law (like speeding) are either widely seen as acceptable or are less immediately visible and obvious than cyclists jumping reds, even though they're objectively much more dangerous!