Earlier quoted context omitted.
The WITH_XC_NETWORKING build option is off by default so the developers have obviously intended this to be a valid build configuration.
Sure, but that doesn't change the fact that a point release suddenly broke everyone's workflows and is causing maintenance headaches. I don't think the technical minutia of how exactly things were broken is the issue. If Debian shipped a Linux kernel point release that disabled networking I think people would be similarly upset, even though it's also just a build option and intended to be a valid build configuration…
That is not comparable. "If Debian shipped a Linux kernel point release that removed a risky networking plugin and some disabled-by-default plugins and made a -full version" that would be comparable.