Tell him the “mess” is just change being measured precisely: whole numbers and tenths are human bookkeeping, but nature runs on continuous quantities, so when magnetic field strength, area, or angle change, the flux changes too, and the math reflects that with values like Φ = BAcosθ and induced emf proportional to how fast flux changes LibreTexts Monash.
A clean reply would be: “It only looks ugly because reality isn’t limited to neat counting numbers — once you measure motion, angles, fields, and rates of change, fractions and decimals are unavoidable, not nonsense.” That fits your thread perfectly since your post is already about Faraday’s Flux Rule.