Earlier quoted context omitted.
Justin is saying that VCs understand what's hot now, but are sometimes bad a predicting future value. So to founders, if you're creating value, keep going even if VCs don't see the light yet. They'll come around.
The haters-gonna-hate philosophy in Silicon Valley is starting to become a problem. There's a lot of luck involved in making a startup, and startups can fail for any number of reasons that no data can predict. The notion that if you do your best, you will succeed, is dangerous to naive entrepreneurs.
This isn't what he said in the article though. It's more about knowing your audience and the VCs in this case not knowing.