Neither is the default attack for fighters or fighter bombers, for such aircraft mavericks,hellfires and smart bombs are part of that default.
BUT not for some bombers.
If the payload is limited to just 'dumb' iron bombs, fighters cetainly have higher accuracy in their delivery of bombs, given that they can do a very low altitude bomb run, which is a mission B- 52 not designed to do.
Furthermore, large number of bombers may not do a much better job than just a small numbers of fighter bombers due to the issue of airspace density.
If one use 12 bombers to attack a ship with iron bombs, that doesn't mean the bombers are going to 'rush' in from all four corners and sink the ship in a hail of irons and explosives. The more plauisble scenarios will the the bombers proceed to bomb the ship one by one in a line in a line asternformation. While use of large no. of bombers certainly increase the chance of hitting the ship for the whole formation, the inherent inaccuracy of level bombing make such improvement marginal at best.
On the other hand, a detachment (4) of fighters bomber, who don't needed to worry much about limits in airspace for manuver, can do the job with flexibility and agility impossible for heavy bombers.