Oh my. I'd rather tell myself that you're trolling, than lose my last scraps of faith in humanity.
Math education is worse than religion when it comes to blind adherence to tradition. A lot of kids who learn calculus in high school should be learning statistics instead, for instance. And a lot of time in engineering school is wasted on worthless analytic techniques that should be spent on numerical methods that the student will actually use. Never mind the holy wars about how linear algebra should be taught. Compared to the ferocity of these debates, fractions seem like low-hanging fruit with few arguments in their defense.
Classroom time is limited, so we need to make every minute count.
Well perhaps the fact that we wouldn't know how to divide 1 unit into 3 equal parts?
And if you're going to respond that an approximation is always good enough "in engineering", how would you estimate the amount of error you're introducing if you don't know what fractions are?
> Math education is worse than religion
Another more recent religion is that of people who defend that you should only learn the narrow set of things that have immediate application in the work place (these people also forget that there's many different work places with different demands. These people normally have dumb jobs). If you learn only things that have evidence application, nothing new will ever be invented. Math education has a lot of problems, but learning fractions isn't one of them.
Learning LESS is never the answer. I'm being very honest with you when I say that someone arguing we shouldn't learn fractions might be the absolute dumbest thing I've ever read on HN.