I mean he did cut fire. Which is apparently a hype thing to do
Marco's body seems more similar to a liquid logia instead of a gas one, so cutting his body parts is not something relevant.
Cutting crappy fire attacks of characters that do not have the Mera Mera fruit is not something special since their firepower with those attacks are crap compared to their core attacks (Oden like nothing after a Boro Breath in the face, Oden severely injured after the club's attack), and besides that's a technique specifically designed for those attacks. It won't work like that with, let's say, a water blast similar in AP or any other type of attack.
So it's not something special, this technique is only for certain situations and characters.