'Business development' and sales are intertwined but the misconception is that the function of sales and business development are interchangeable.
When you think about the function of business development, it should be thought of as a marketing, not a sales function.
Surround yourself with your generals (specialists, engineers, whatever) your job is to open the door for the others to pass through. You are not in command of the theatre. You are the ringmaster not the star. Learn to hand off to the experts, in their field of endeavour. They will make you shine so bright it will blind your adversaries. You fish’em and your team scales and guts them. That is the way of the fisherman. You are a fisherman. Find the right people to perform the right job.