idk, I think grime is fine with choruses, it has issues with hooks. there are exceptions (Ruff Sqwad) but in general they're really lacking. this is why grime lends itself so well to pirate radio or clashing, where dudes can just flow endlessly, but often struggles to craft memorable songs. it makes perfect sense, since grime comes out of the jungle/garage tradition of MC as track/crowd hyper rather than MC as artist.
granted a lot of rap has this issue too, more so in some kinds of rap than others. being able to rap and being able to craft songs are too different things. way more people can do the former than the latter.