Let me just reiterate my point in my earlier post that this debate has been driven by those who are imagining claims that have never been actually said.
If you believe you can infer values from what Brendan is saying, let me remind you that they are your words, and not necessarily his.
As for the evidence that he is posting regarding Arts, it is empirical evidence - a statement about the world. It is a
positive statement. However, this has little to no implications without a
normative statement. An example of a normative statement is: "money is important," and hence combined with the positive statement, if valid, then it argues that arts is not important. However, that normative statement is not something that Brendan has argued for, and so it is up to you decide for yourself how to use the positive statement, according to your own personal values - your own set of normative statements.