The author did preface it with "i know" which does condition it as their experience. But yes they may have a experience that is the minority to the odds of running across a bad VC and generally once you are in a VC group you tend to use those connections in the future. For example I just had a really good idea the other day, called a good VC that I know and we are working out the details now to start working on it. If I had met her as one of my first contacts, I probably would have not went through the learning process that I did.
This quote is from someone who has not been around the block.