Can you expand on why you think it is wrong or problematic?
Tightly coupling a lot of the application-specific compute in with how the day is stored and accessed says you up for even more difficulties when you need to debug, scale, migrate storage/compute or evolve your application faster or more radically than your data organisation.
Plotting a Mandelbrot on the Mac would take a lot longer, even in C, than just making the printer do it.
Usually overnight, because the program took a couple hours to run most of the time.
OTOH, if you can pre-process the data (or shards) in the server (or servers), you won't need to move it across the network for processing.
Hard problems are hard and one of the reasons databases outlive their systems and developers is because moving that data is a Royal Pain.