No, Kidd is not a realistic version of Luffy. Luffy wouldn't send a King Kong Gun at Shanks' fodder with the intentions of vaporizing them lmfao. Kidd could've made a peaceful landfall and fought'em to they were unconscious—given they were compared to Paradise fodder, that shouldn't be hard.
Instead, Shanks sees the entire fleet being torn apart (human bodies as well). You get what you give.