If he thinks rap is current... Rap's been around for nearly 40 years - e.g. Rapper's Delight 1979, or my favourite the Message, grandmaster flash 1982.
I'd say Grime and drill sound pretty current though, but hardly mainstream enough to replace 'rock', whatever that is classed as.
He gets some great publicity though, as if he was some type of music oracle or spiritual guru, best of luck to him.