Its not on casual. Ronnie 2K confirmed it is on the
default gamerstyle.
Default Gamerstyle per Mike Wang in the "Making a Smarter Game" dev insight is as follows:
------Default: Kind of a hyper-realism. Shooting %’s will be slightly higher than real life, there will be fewer fouls, slightly more dunks, more and 1’s, etc. “Let ‘em play hoops” so to speak.--------
In addition to the default gamerstyle, the game is likely on default settings. Usually for 2K that means the level is on Pro, or whatever level is equivalent to Pro.