The only thing that justifies a validation scheme is its ability to provide an accurate quantitative assessment of the thing being measured that can be translated into business value. In the case of security, this would usually be a quantitative assessment of your security relative to a threat model and actionable information that allows either a more accurate assessment of underlying risk or an indication of where to deploy resources or how to deploy them more effectively.
Personally, even if I accept your claim that it is better than a penetration test and less than a team of penetration testers I do not see how this is very useful. Any substantial threat to a commercial entity can easily round up enough resources to be comparable to a team of penetration testers. As essentially any moderately competent team of penetration testers can completely compromise any commercial entity, the actionable information gained from penetration tests on most commercial systems is: "Your system is hopelessly insecure against substantial threats.". Therefore, inserting another level of threat competence below that allowing you determine if you are "hopelessly insecure against insubstantial threats" vs "hopelessly insecure against substantial threats" is not particularly helpful. It would be like testing bulletproof vests against BB-guns, even if it succeeds, it does not tell you anything useful about its effectiveness against the actual threat.
I assume from your comment that you to think that "covering ass" adds value to security, it does not. Because if you, like me, judge this product as being redundant, then what value is truly added? What if a competent team of pentesters is rejected and favor of this tool? Then you made the world less secure. An organization not competent enough to run a security scanner will certainly not see the benefit of this product.
The current status in cyber security is that of safety in engineering three centuries ago: "This bridge is secure because we walked two oxen over it, and it did not collapse.".
"Our bank is secure, because no hacker has stolen our funds yet."