I would have thought that all the documentation and tutorials would apply equally to CentOS Stream — as I understand it, the only real difference is the schedule for releasing minor patches and bugfixes.

Is it the case that RHEL provides vastly better, more detailed changelogs for minor/bugfix updates (even to the public without an RHEL subscription) and that's what makes so much difference that an exactly-compatible rebuild of RHEL is useful but CentOS Stream isn't?