The point of the phrase "reality has a liberal bias" is not "liberals never take a nonsense position", it's "more of the facts that liberals [just as tribalistically] believe in happen to also be true, when compared to conservatives".
That something like this might happen is not surprising. If you have two political groups and you assign both beliefs from a bag in a purely random process, odds are that one of the groups will end up with more true beliefs than the other, through no virtue of their own but through pure chance.
That something like this might happen is not surprising. If you have two political groups and you assign both beliefs from a bag in a purely random process, odds are that one of the groups will end up with more true beliefs than the other, through no virtue of their own but through pure chance.