In my life, I've never liked people who deliberately polish up their articulation to the level that it obfuscates how they arrived at that understanding (whether it's academics or engineers). They might not do it for attention and they might not be doing it knowingly. IMO, they are taking away the opportunity of learning from the people they are talking to. For me the conversation is one sided. I'm there to listen, but rarely can I ask questions, give feedback or grow from where they have possibly reached.