True, but I'd wager the majority of readers/commenters are not investors but entrepreneurs. It'd be nice to see more support and can-do-ness rather than dumping on ideas. More constructive criticism than that's stupid and will never work.
The entrepreneurs are probably faced with a bit of 'zero-sum' syndrome, where if someone else is doing something successful or cool, then they may feel that there is less room in the market for their own idea/product.
I personally come here for tech related stuff (not an entrepreneur, don't particularly care to become one) but still find myself getting caught up in the latest funding BS news. Unfortunately, SV (and HN) seems to be getting watered down with a lot of money-chasers. Of course, I am sure someone, somewhere was saying the exact same thing 30 years ago, so whatever...