Where is this "it was the fact that no matter how powerful Luffy was Kaidou was just going to try to straight up melt his arm if it wasn't defended with ryuo." explicitly said?
I asked for evidence of Whitebeard beng able to do so. Ryuo being another level of applying armament haki that you can apply on to weapons or attacks does not mean a character can inherently do it in other facets. Not responding to the argument and instead calling me a pseudointellectual hurts your case more than you think you just helped yours.
Re-read 1048.
paraphrased:
Kaidou "your arm won't come down, I'll vaporize it"
Luffy "no you won't... Hyogoro taught me ryuo ( I don't have to touch you)"
It's not just "attacks", Rayleigh and Luffy use INTERNAL DESTRUCTION ryuo casually while handling handcuffs, Shanks used it to protect his sword from melting when blocking, Rayleigh used it on a simple palm block.
You think WB can't use BARRIER ryuo despite travelling with Oden for years? You need to give evidence for that as that is a ridiculous claim.
Do you claim that Luffy can't put ryuo on his head if he did a skull bash attack? If so why? In the manga he did that with not only ryuo but also adv CoC against Kaidou for a no touching headbutt clash, no different from any of their other attacks.
If he has it on his head in an attack, why would he be unable to flow it on his head when trying to "block". Creating an artificial distinction between blocking and attacking, when most of the time blocking involves hardening/ counter attacking in some form anyway is just bizarre.
You smarmily "trying to educate" others on logical fallacies in 2022 when that has fallen out of vogue for neckbeards to do on the internet over 10 years ago does make you look like a clown to me, just calling it as I see it.