He’s a postmodernist mathematician. He PRETENDS to care about things like rigor and reasoning, but believes the axioms are arbitrary—which of course makes mathematics and logic arbitrary.
He is, in other words, lukewarm: he wants modern rigor but postmodern arbitrariness.
Free association isn’t INFERIOR to rigorous deduction—it simply depends on one’s axiomatic choices.
Which sounds like free association.
Because it is.