Why is Mario Bros. Circuit so massive? (Don't come for me in the comments lol)

I mean this course looks humongous!! And yes im very aware it'll have 24 racers but some people say it'll be like an open world thingy and not just for racing but idk if I would like that or idk if they would do that honestly, But I wanna hear yalls thoughts on why it's so big and do yall think it'll be an open world map? Let me know down in the comments.

I mean this course looks humongous!! And yes im very aware it'll have 24 racers but some people say it'll be like an open world thingy and not just for racing but idk if I would like that or idk if they would do that honestly, But I wanna hear yalls thoughts on why it's so big and do yall think it'll be an open world map? Let me know down in the comments.