Again, this isn't to say that the humanities are useless for everything, it's just that they're not very useful for obtaining known-to-be-accurate knowledge about the world. The best they can provide are best-guesses about ideals. Which is it's own useful tool for studies involving more thought-based exercises.
Very good summation. This explains exactly the study of history, which was my field of study. It is very hard to know exactly what happened in the past. At best we have a very good interpretation of the facts.
For example one just has to look at the recent scholarship about Lewis and Clarke and the Battle of Little Bighorn to see that history is a "best guess" field. This is not to say it has no value, it has extreme value, it is just that there are not absolutes.
Facts don't lie or have an agenda. Facts are just facts