As minimal as it may be, theming is still theming. That’s enough to establish what some themes for the ride might or might not be, it’s theming. You wouldn’t see that and expect a sci-fi theme.
Off on a tangent here but I actually love that they took the time to do that because it could have been left as bare concrete. Sure an attraction or area might not exactly be Disney or Universal but simple things like architectural choices, types of rides, or signage/names are plenty to establish a theme in my opinion. Canada’s Wonderland is generally great about this, it’s one of the reasons why the park looks so nice. The coaster itself probably won’t be my cup of tea but I like what they’ve done not just with the dive but the hardware for it as well.