I didn’t say they were always overly long. I am saying that if there’s room to square the toe, there’s room to round out the corners for a correctly shaped foot, for the reasons I listed. Horizontally shortening toes helps a lot of horses, as long as you don’t shorten too much, But unless you are trying to force a particular direction of breakover, you don’t want square toes.
Every squared off toe I’ve ever seen as helping movement, was actually just putting the breakover where it belonged, taking the stress off the back of the leg, hamstrings, stifles, and SI.
Meaning - it’s not usually the actual squaring that’s the fix, it’s the fixing of the breakover that’s the fix.