The reason smart bombing fleets arent super regular is due to the amount of preparation needed before the fireworks start. you need to know a region very well, find a good spot to pipebomb, usually in pipe systems with only 1 other gate, and have eyes on the fleet to make sure they warp to you, properly set up drag bubbles with dictors, more intel, more spies, and then the 30 seconds of an entire fleet disappearing before your eyes :P