The distinction is between "low-hanging fruit" ideas ("Let's start a cafe!" "Let's start a WordPress theme business") and "high-value, high effort" ideas ("It's 2003. Let's build VoIP software.").
Today's narrative pushes people to try vibe code as much ideas as possible, even in parallel, but I don't think it's a fruitful approach. One should not be afraid of doing something non-typical (hard) if they belive in the idea. And if you believe, dedicate some quality time for it. If you don't believe - why bother even with prototypes?
That takes a lot of quality time to just figure out the right syntax and semantics, let alone having to figure out how all of these complex pieces fit together!