Correct, for most people. The book I quoted is by Dr Robert Lustig who is a leading voice on that point of view. He would more or less say insulin resistance is the root problem. Chronic conditions like hypertension are symptoms. The whole book is an argument in favor of curing the underlying metabolic disease with diet adjustment.
Cutting out sugar and carbohydrates is key. Recommending lowering salt intake is a low priority when the root cause is usually insulin resistance/obesity.