I agree that we should never take Fake Skateboarding and a video game TOO seriously, but in the same thought is the fact that most of us spend a ton on hours skating and filming and perfecting our tricks/lines in order to put together video parts. As I see it, if I spend the time in HC mode to film tricks and put together a part I can be proud of, I want others to KNOW that it was put together in the most difficult mode in the game. And also, when I watch other people's videos I want to see what can be done in HC mode at specific spots or gaps and KNOW that it was done with the HC physics....
So Voldy I do not think it is takin a game too seriously, I see it as coming down to time spent and effort put into a part that you would like recognized as an achievement to yourself and others in the community.