The point of "points" is nobody can estimate how long a task will take and it gets worse the larger it is. So it's better to have reference tasks of a certain s

The point of "points" is nobody can estimate how long a task will take and it gets worse the larger it is. So it's better to have reference tasks of a certain size and complexity that you do know how long they took and compare to those to get a general idea. You could use hours in that context but it's trying to make you think is terms of size and complexity not hours.