If you're going to defend him, then throw a copy of The Shock of the New in front of a truck, so that he can read it.
We don't personally know Falma, but from what stuff his been doing for the last chapters back, that's what I came with.
Falma even indirectly saying the other types of painting exotic rather than unique artstyle. It kinda suggest he's not that much into it.
Secondly, Falma said that Duke Dale change
his profession, and I think I remember that the Queen is the only one that can give a royal job to the people. She's the one that gave Lotte a badge of Royal Painter if I remember correctly, which makes her confirm and acknoledge by Queen.
Thirdly, since the Queen is the one that gives the
Royal Profession, I do believe she's the one responsible for naming the said profession that was given to Duke Dale, right? And she's doesn't understand art but is interested.
To summarize what I said,
this is what Falma said in his mind based on what he heard. And Duke Dale changing his profession from
Royal Painter to
Royal Abstract Painter is because of the Queen, who don't understand art itself. So this world don't have the term called Surealism or surealist art yet, just that the word Abstract is common word so they called Duke Dale an Abstract Painter.