At some point in teaching logarithms students tend to hit a point of despair, at which point their usual line is “why would we need this for anything?”
One of my most vocal complainers didn’t care about math at all and wanted to be a photographer.
Each field has their own set of books that contain just the mathematics people in that career need to know. Such books are excellent sources of realistic problems, and if you happen to have the physical book at hand, you can make a student’s eyes go wide.
I ended up creating a lesson around f-stop sizes and the “zone” system of Ansel Adams. (Unfortunately, the student in question was absent that day!)