No touching is ACoC + ACoA. Luffy used Ryou against Kaido and made contact (Red Roc).
Where is this from out of nowhere?
Garp is using Haki, I want to see if you can tell which Haki you know Garp is using since you're so knowledable on Haki.
The truth is we know shit about what Haki each character is using unless Oda spoon feeds us. He made Haki so inconsistent that anyone who claims that X used Y is bullshit.
Regular haki can accomplish what Coby did, whether it's Advanced or not, neither me or you knows but Oda, just like many people speculate Garp and Aokiji using ACoC when that explosion panel came because it's similiar to Shanks haki explosion.
Yet Oda didn't bothered telling if it was or not, therefore it was inconclusive. It's all speculation.
Thick lines this, trail that, doesn't work when Oda barely makes an effort to differentiate the Haki types.