Man, take look at the scale and size of hiruzens jutsu. Any homing missile is interrupted with a ration projectile. Kisame is almost useless in the air, too. The frog song requires prep, but when either opponent can't touch Jiraiya in the air, that is fine.
I've seen the jutsu, the raiton is the one most easily avoided tbh as its the thinnest, the bombs have the choice to go up, under to the right or to the left, and Hiruzen striking it with the raiton when its fired at another opponent in a different direction is quite a feat :lol So saying Deidara can't hit Jiraiya with bombs is foolish. Not to mention he can throw C1's at the same time, or have the mines rain down on them from the dragons mouth once they reach the air. Hiruzen isn't striking all of them especially if he hasn't created any clones yet.
What stops a GSB fired from above right down at them exactly? Hiruzens doton counters 1000 sharks, which is an effective way of attacking them both at once.
Frog song lets the opponents know what is happening, Not to mention this is outdoors going high up in the air where the soundwaves cant reach is viable, reason why frog song is the most overrated jutsu and needed specific paramters to be even half useful.