That is again wrong, look at his face here:
Jinbe before Shigan and after Shigan and Gagan.
He his damaged, have cuts and bleeding.
You literally said that Jinbe didn´t take 0 damage, remember?
Im not saying it the manga show it, everyone can see it, Jinbe get pierced again and again and losing blood, look at the panel where WsW pierce him even though he using full body haki.
That is probably what Katakuri mean back then. Their is lvl even between haki.
Fullbody haki<Fullbodyhaki with black lightning
Look around the area where WsW hit Jinbe with full body haki:
Jinbe clearly get piierced and losing blood...
Second page:
Above he get still pierced though using full body haki, then when he activate black lightning, WsW broke his finger and get pushed back.
Fullbody haki with black lightning>normal fullbody haki(what we see from Pica/Vergo).
@Sentinel ,
@Buusatan94 ,
@Bogard ,
@Hanzo hattori ,
@MonsterKaido