No problem--at the very least I helped correct an obvious oversight :)
I think part of my interaction confusion is that the bottom of the screen isn't an obvious place to look--I think I remember seeing that once on a character or something, but wasn't looking for it when I interacted with a door. It might just be user error combined with a lack of need for things--good to know there aren't a ton of systems that exist but don't do anything ;)