There's plenty of people that are skeptical and making it a point to tell everyone they are skeptical. There's plenty of people that are skeptical that are still engaging on the possibility of it being real because it is interesting to do so. There are plenty of people discussing potential pitfalls in the papers being written and experiments being done.
But ultimately talking to people in the comments on HN is a form of entertainment for most of the people engaging, and skepticism is a lot less entertaining for most people in general than being enthusiastic and engaging on possibilities. It's not surprising that people going somewhere for engagement and entertainment are doing the thing that is more fun to the majority.
I doubt the majority of people that are excited about it would place serious money on it being true - I sure wouldn't. But I am having fun watching the developments, talking about things to the minimal extent I understand, and thinking about the Cool Stuff that would become possible if we were to suddenly have a new room temp ambient pressure semiconductor