True, the world is a bit unpredictable. That said, if you’re invested in a very broad index (like VTI, VTSMX/VTSAX), you are as protected as possible. If those indexes collapse/devalue, there are far greater issues going on than money. You would be fighting to eat and survive at that point, and money would be worthless. So, other than the world ending as we know it, you can be FI and have 99.9% assurance you are financially safe.
JVZoo lets you both host and create landing pages on their own website, so it’s far better suited for professional marketers who want to flood the internet with offers, many of them for courses to make money. You don’t need your own website to participate in JVZoo, but you will need to know how to drive traffic to a landing or squeeze page in order to profit from being a JVZoo affiliate.