Again the point - protectors do not define protection. Protectors are simple science. The 'art' and what most all questions should have focused on is what actually does the protection. What do hundreds of thousands of joules harmlessly dissipate?
Major points were summarized. Such as a ground connection must be as short as possible (ie 'less than ten feet'). If a ground wire goes up over a foundation and down to an electrode, then protection is compromised. If a ground wire is inside a metallic conduit, then protection compromised. A sampling of what really defines protection. Yet so many discuss what little defines protection - the protector.
The term 'single point earth ground' is a serious requirement. And yet nobody even asked what the majority of questions should have targeted.
The point: protectors do not do protection. Hundreds of thousands of joules harmlessly dissipate in what defines protection. Why is shorter wire length more critical than wire thickness? Nobody asked.
Same mistake applies to lightning rods. Many will argue pointed verses blunt. Despite popular myths, blunt is more effective. But it matters little. Because 'pointed verses blunt' is negated by something far more important. A connection to and quality of earth ground. So many ignore what they cannot see. Many are concerned with what is less relevant; but easily observed.
Neither protectors nor lightning rods do protection. In all cases, protection is mostly defined by what almost nobody asked about - earth ground.
If appliance damage occurs with an installed 'whole house' protector, then informed techs find the human created mistake by reviewing what most often permits damage. A defectively installed earth ground system.