Ok hear me out, yes for those F1 fans (including myself) it is a shitty race track, but it is one of the few race tracks with a airport right next to it, what a convenience for this airplane game.
This airport is small enough so that it won't lag the game, and with a famous race track next to it its perfect for events to gather more WP and cash.
But I feel like F1 is also a bit overused, so Imma also add another event thats similar, but at least its not Formula One.
Lets add WEC and GT Endurance racing job events into the mix, a slight difference is that because they tend to last longer than F1, so the job cycle for them can be slightly longer. And they also tend to bring in more stuff like spare parts and repair equipment since they can repair more during race (hence more parts delivery).
So yes, both the race track and the airport next to it, as well as another job event that is not F1 atleast.
Also totally want to add this because I saw Sepang Circuit in the Asia region (Do we have F1 job events there ? or even MotoGP ? someone tell me it in the comment section below I never ran into one)
SLIGHT EDIT: Allow larger planes like Boeing 747 to arrive at this airport because apparently they do use that to transport F1 cars and others to multiple places (is isn't stated where they travel to use it though) but since this have a airport lets just allow it.
Also DHL uses the 747 to transport them for those that don't know.