Concept art is much different than the actual design of the ride. Concept artists are essentially tasked with taking the designers concepts and turning them into a (semi loose) piece of art that can be released to the public to garner excitement for the new attraction.
I’ve attached old concept art for Cars Land at DCA, and you can see the slot track wasn’t illustrated in that art. In fact, they just included the broken white lane divider lines to show the racing element, instead of two different slot tracks.
Short story version, concept art is never intended to show how the ride will actually work. It’s basically marketing artwork.
Look at the Skull Island outdoor section to prove your point exactly.