By yourself it doesn't matter but when you work with teams it is nice to have a consistent style. It's like asking why we have style linters, brand guideline bo

By yourself it doesn't matter but when you work with teams it is nice to have a consistent style. It's like asking why we have style linters, brand guideline books, and so forth. They're not strictly necessary but it makes things more pleasant to work with. And it takes zero effort to use the imperative.