I used to have a terrible eye. Every course I would have at least one “oops, long, no short, no long, ahhh!” jump where I would end up on my (very honest!) horse’s neck.
Ever since working with my eventing trainer I have ignored “finding the distance” and focused on rhythm AND letting my horse find his own distance.
I really don’t have bad fences anymore. Sure, they’re not always the “perfect” distance, but I’ve learned how to help my horse jump better from any spot - like everyone said “sit up and leg” and “count your rhythm”. If I have a bad chip or a long weak spot now, it’s because I’ve forgotten to do one of those things.