I think of it this way: to run a business, you must understand what the business does at least well enough to "grok" how it creates value and to tell the differ

I think of it this way: to run a business, you must understand what the business does at least well enough to "grok" how it creates value and to tell the difference between good ideas and bullshitting. At the very least you have to be knowledgeable enough about the details to spot other people who know more than you do about said details and distinguish them from bullshitters. In technical companies, engineers are often (but not always) the people who really "get it." Yet not all engineers have the other skills you need to lead a business like good communication skills, people skills, decisiveness, etc.