If you're in business, and write business letters misspelling "business", you aren't going to be taken seriously (though you likely won't realize why the rejections are happening). If you graduate from a business school and can't spell "business" then the school's reputation suffers, too.
In college, you're an adult. The requirement that "business" be spelled correctly is made quite clear. No excuses, no bullshit.
So one day, he got the pilots together, went out to the runway, painted two strips crossways and demanded that all pilots touch down within the stripes. There was a bunch of whining about it from the pilots that it was unfair and impossible.
So Yeager fired up a jet, took off, circled the field, and landed precisely in the center between the lines. He got no more guff from the pilots and they straightened up.
Me, if I was in a combat squadron I'd choose to serve under Yeager rather than a commander that tolerated sloppy flying skills. Sloppy skills will get you killed in aviation and especially combat.
Story is taken from "The Fog of War" as told by Robert S. McNamara.
Caltech had a famous class, EE91 lab. The rules were simple. The first week, you produced a spec for a project. If the spec was approved, you had the whole semester to get it done. If the project met the spec, you got an A. If you didn't, you got an F. Again, no excuses, no bullshit. It was a very popular class.
I took it too, was very careful to spec something I could accomplish and got it done well in advance.
These students aren't in kindergarten. They're adults in college. And getting your project designed, built, and debugged is a LOT harder than remembering how to spell "business".
The disservice to the students was done by all their prior teachers who'd make such conditions and never enforce them, and they didn't believe my dad would, either. What was he supposed to say, this time I really really mean it? (He did say that.)
I've heard innumerable such conditions from teachers, none of them ever followed through except EE91 lab.
It's important to teach the values of timeliness and attention to detail, but you aren't teaching anything if you're not giving students a way to recover and improve.