By “on the edge” do you mean “on the brink of disaster?” If so, then we say do what you’re going to do, you rebel, you.
To everyone else, we caution that shooting and editing a video can be expensive, so you want to do everything you can to reduce your cost. If you’re renting a camera for $100 a day, wouldn’t it make sense to make sure the shoot takes the least amount of time possible so you can return that camera and save money?
OK, if you’re shooting video of your child’s first birthday, you probably don’t have to break out your screenwriting software and storyboard templates, but the bigger your production becomes, the more pre-production planning starts to make sense. Time is money, so spending some time now may save you lots of money later.