I think they can rap...The average so called "GREAT RAPPER" is overrated...
Take Jay Z for example, he may have an extensive vocabulary than Chief Keef, but other than that, they rap about the same things i.e. having money, designer clothes, and etc...
Now, Jay Z is a dude who shook hands with Warren Buffett, Barak Obama and other influential people of our time, and all he has for subject matter is Tom ford glasses and how he used to be a great drug dealer once upon a time...
Great rappers are greatly overrated, and so called bad drill rappers are greatly underrated....It is not like Jay Z is rapping about ideology and a philosophy that will actually open your third eye and make you see the world with a new way of thinking...
All he is talking about is nice Gucci bags and etc...Just because he uses more words than the average Drill Rapper it doesn't mean what he is saying is enlightening...
I am just using Jay Z as a generic example...