That might be what the disagreement here is. The sentence is very ambiguous because its not literal, though it can be read literally as you did. The poster is saying “I’m the dumb one for being the only one working in valve who is reachable by the public directly through social media.” Your interpretation isn’t wrong, but without the wider context of shorthand speech patterns you get from English as a first language, it can be difficult to figure out the implied message. English has a funny habit of saying one thing, but meaning another thing.