(Author of the post here) I think the key point is that even bad businesses take time and effort to create!
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.").
Where is Skype now? what good is creating something just to sell out and have it destroyed? High value? Skype's value right now is $0.
Sure, I agree. I was more about encouraging to not be afraid of something hard.
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?