Pretty much this. A lot of startup and small business devs here are used to just being able to change software at their discretion which is awesome and great, but it just doesn't work that way often at enterprise shops. Changes and requirements come through the product management pipeline via customer interaction. Anything that isn't delivering business value in the form of appeasing existing customers (bug fixes and niche feature requests) or attracting new business (new features or integrations) is basically put into a backlog and forgotten until someone gets frustrated enough to sacrifice a weekend adding/fixing the backlog item.