Not everyone is a lorehead! I see fans of lore often jumping into a discussion and pulling out lore. It is as annoying as a dog that was trained to fetch the newspaper but keeps fetching the neighbor's paper instead. I am not saying the fans of lore are dogs, I am just trying to get a picture across of how annoying it is. It is cute, too.
Your argument that lore must not be invented is typical for a lorehead. It smothers any discussion on what could be and limits it to what it must not be. There are also discussions purely on lore, which I avoid, but the loreheads always believe that everything must be based on lore and that lore dictates all and they carry their believe into any discussion.
Lol, I'm a relative newb really. I'm hardly a "lorehead". I just catch on quick.
I would say the same thing though if we stumbled upon each other and played a game of basketball. If you started inventing your own rules, I might just leave you to it and quit. You can play by yourself. The only reason basketball is fun between multiple people though is when there's an established set of parameters of what basketball even is. I wouldn't get too pissed if you started fouling occassionally, but outright blatant rule breaking would just ruin it.
Now back to this game world. There aren't too many established rules, and even less established facts that we have to agree on. If I am a "lorehead", I'm not a very strict one. But there are things that are generally agreed upon to make debates worthwhile. If someone just wanted to ignore all of that, and put the burden on others accept their little private views of everything, they're wasting my time.