Generic credentials and experience provide very little information to me on their expertise. The CSO of JP Morgan, James Cummings, was highly experienced and credentialed when JP Morgan was breached in 2014 in one of the largest data breaches in history. The CSO of Equifax, Susan Mauldin, was highly experienced when Equifax was breached. The head of security for Windows at Microsoft is probably highly credentialed and experienced, but we all make fun of the insecurity of Windows. This is why I am interested in the specific projects they worked on and how they stack up. It is much harder to game the system if there is concrete, auditable evidence backing their expertise.
Yes, guidelines are not the end-all-be-all and you can never be sure, but when a civil engineer approves a bridge, they assert that they are confident that human lives can be trusted to the bridge (in certain configurations). They can do this with reasonable confidence because they have seen systems that have stood the test of time that prove out the techniques that they are applying. That is what I am interested in, do you/they have that level of confidence? What justifies that confidence? What systems prove out the techniques that were used? Did any techniques they invent stand the test of time (this provides evidence they can invent new techniques)?