It's all down to turn-around time. SpaceX talk about an operation that would be like a busy airport. ...or airports.
What's rilly interesting is what they will use for a payload when they test the BFR. it's 30ft across and as big as an Airbus A380. Volunteers?
edit:
The guide vanes are larger because the nose-cone caps
spoil the drag compared to the Falcon 9.
Let's see how long this works as a live embed:
It reminds me of the opening scene in Heavy Metal where the Corvette falls from orbit to the Earth. ...while Don Felder thrashes his guitar.
https://weburbanist.com/2017/07/02/like-a-rock-star-12-iconic-movie-corvettes/