Why do your personal networks matter? Why does who know matter? It isn't about what they can do for you, it is about what you can do for them, so you can work with them, learn what they know, learn from their mistakes and their wins. It is all about knowledge and skills.
It is often said, and I believe it, that you are the average of those you know.
If you want to get better, you need to upgrade those you know and learn from those people around you that you can. You want to get better at sports, you play against people who can play better than you as much as you can. You want to learn chess, you don't play people worse than you at chess, you play those people that are better than you at the game. If you want to be a chess master, you play chess with masters. You want to be a great entrepreneur, you compete, you talk to, you work for and with the best business people you can find.
Being an entrepreneur is all about taking the opportunity when it comes, and the more opportunity you can get coming your way the better the odds one of them will work and that you will succeed.