So, let's say our planning works. We take the safest route, by collecting the spiritual stones, rigging the bridge with bombs, triggering the cutscene when the trap is placed, blow up the bridge right after Zelda crosses it, and Ganondorf's horse falls into the moat and breaks it legs.
So now what? How do you expect 100 of us to take this 7 foot 7 giga jacked warlord with Gerudo magic? We won't have the Master Sword, we won't have Light arrows or the bow, and we won't have the Biggoron's sword. Keep in mind, Link got completely incapacitated by a single hand blast from him.