What am I missing?
I understand that some photographers prefer to shoot freeform and then crop in post, getting exactly what they want without taking the time to compose properly in the field to begin with. That's fine if that's how they like to do things, or in situations where your lens just didn't have adequate reach and you want to bring things closer. This is a good example of why this is not the best technique and it's always preferable to have the right lens and equipment to do the job and a proper eye for composition in order to avoid costly cropping in post.
"I've been in more laps than a napkin" - Mae West