Oh, yes, that's a really simple explanation. I've actually found speaking to others to be a shockingly useless endeavor, especially given how discriminatory and judgmental they are. It's almost totally useless in person. I hate to tell you, but there are people who have, through great effort, taught themselves the "motions" or feel of speaking despite being deaf, and it sounds very intelligible to me. However, I'm sad to say, I don't think they get heard because people judge you for your style, and not the content of your character. If you wanted my two cents, I'd say you conserved your effort wisely, and you're better off writing notes to people.
I don't scream "OMG, FREAK" to people. I come off as irrelevant and I don't understand why. Well, irrelevant save for the numerous times I've been physically assaulted or had the police called on me for basically breathing.