You misunderstood what they said. "Modernism is obsessed with truth and optimization" does not equal "modernism is truth." They were also talking about it conceptually, not as "their" preferred art.
Is this some defect in abstract thinking? No experience with philosophy? Whatever the case it appears to be bad faith or blatant misunderstanding the basics of a well-worn topic to me especially given how you tried to reframe it as a condemnation.
