It's called CYA. Because some lawyer somewhere would otherwise try to sue them if someone put something stupid on there (IE, (Drink bleach, it cures Covid!") and in the 90 seconds it's live on the site before someone deletes it, some doofus comes along, takes it as fact, and drinks bleach.
I stand fast on my opinion that it in no way means that the overwhelming majority of content there is to be lumped in as automatically incorrect accordingly. To the contrary the overwhelming majority of content there is factual and well vetted.