I went to a Prep School that offered a Classical course and nothing else. When I first tried to become an Engineeer they Noticed a certain Lack of Mathematics in my background.
So I enlisted in the Army in 1965, great growing up experience, two years of remedial Math, and I are one, since retired after doing little Engineering and a lot of Army NCOing as a Manager. A love of the Classics is a good thing but but being able to eat well is better.
I’d say that your Prep School did a bad job of Prepping you ... I’m all in favour of a well-rounded education, but that would include the maths as well as the classics.