it’s a prescription rather than a cosmology
I don’t think Chapman would disagree with this. According to the “yanas” page Buddhism-at-large in some sense allows several fundamentally contradictory worldviews without a firm commitment to an overarching cosmology. The free version of Claude says that this framework is pretty much standard Tibetan Buddhism.
Sorry, should be fixed now.
AIUI his point is that the worldview and practice are supposed to be a congruent package. Since renunciation is the fundamental principle of Sutra, the practitioner should occupy a state of mind where it makes sense to renounce undesirable stuff. I wouldn’t be surprised that various traditional Sutra schools significantly differ in their presentation, and agree that it’s misleading to imply homogeneity.