There are people saying this (more or less): leaders can be used in a any field, even a field they don't know.
Being a technical person, I used to doubt this too. But having seen to many bad managers in such a short time, I believe it's true. When you are senior enough, in a small company, you don't need a technical supervisor. You just need someone you can trust, who gives you political backup and who will evaluate you on your results.