You need <anything> because of the hostile nature between the creator and the patron of the creator. The patron wants more, the creator doesn't want to create

You need <anything> because of the hostile nature between the creator and the patron of the creator. The patron wants more, the creator doesn't want to create more, so you need to force a detente so the patron will continue to pay the creator, and the creator will continue to produce. You get t-shirt sizes and points when the patron feels the creators aren't doing what they said they'd do, so in a way it's a communication problem, yes, but the cause of the communication problem is that there is almost never an alignment between the two groups, and so you need some kind of shared language where expectations can translate, and accountability can exist at all, usually in some flawed form.