Well, yes, in the case of a cherished family member needing the airco on, that is of importance ☺️.
In my case, that is not a factor and closed-back gives me the somewhat claustrophobic feel -- which I now assume is why I avoided headphones altogether for most of my life. Open back was new to me and turned out to be a good fit, alleviating my averse against headphones.
Cheers and happy airconditioning,
HZ