Look, its all very simple, "firmware that is not normally changed is ethically equivalent to circuits" https://www.gnu.org/philosophy/applying-free-sw-criteria.htm...

Ya, monitors and hard drives all have very complicated firmware too. It is very simple, it is not denying you a freedom which is unethical to deny. FSF is not saying: it's totally great and fine, I'm sure the FSF will be happy to promote any of those devices if they have free firmware in them, celebrating them as more free. It's the same reason they focus on software and not on hardware designs.