Have I taken for granted that you need to feel these things to succeed or even bother to embark on creating a startup?
However! If your solution is figured out, you’re not really trying to grow, and things are rosy, you can probably get away with it.
In other words, what you describe isn’t the person I’d want for difficult times, but is they are no difficult times, it’s fine.
I think it helps for “founders” to give the appearance of passion for the product, to impress investors, get interest from customers, and keep overworked employees motivated. What they actually feel… who knows.