If the HA community's stance goes on to be made official (for now it's informal forum posts, albeit from senior maintainers), I would argue this is then a case of one FOSS community (Nix) having irreconcilable differences with the community of a proprietary software project falsely advertised as FOSS.

I think you're right. This is largely a difference of opinion. It's a shame it couldn't have worked out better.