As a former structural engineer who lived on a Jobber 5 all day, that’s still pretty niche overall. Easier because it’s what your used to maybe, but outweighed by situations where it’s not. Try doing trig with fractions and then tell me imperial is better.
I’m talking about trig using feet and inches. You know, rise, run, slope… Have you ever used trig outside of school? I don’t understand what you’re confused about.