I am saying Jinbe didn't target Lucci at all. He was trying to create an opening to leave via a dust cloud and thus used the attack on the ground in front of Lucci, which, in turn, created a strong shock wave.
See this is a high-level attack from Jinbe in the Brick series:
You see any dust rising? I don't. Also, it's impossible to not get damaged for Lucci if the attack directly hit him even if it's partial. He's not even covering his body in Haki for us to think he completely blocked it. Even Big Mom can't go unaffected by his attacks.