Yes. But the author makes his living in the market and is sick of having to go through the effort of determining where to invest his money. He'd like a nice gatekeeper to kick all the ones who will fail out so every single investment makes him more money for less effort.
Why doesn't he just give potential investments his test? It is of no consequence to him if the ones who fail continue on and ultimately fail in their business, he will have only invested in those who are guaranteed winners anyway.