Mounts on the bay doors might have infringed on space requirements for other weapons that would be used more frequently. IIRC, the F-117's primary payload was 2

Mounts on the bay doors might have infringed on space requirements for other weapons that would be used more frequently. IIRC, the F-117's primary payload was 2 2000lb bombs, so cutting that in half for a mission that might not be very common would be a hard to sell tradeoff.