I'm not quite sure why it's necessary for booleans to have a default value. Obviously when you are adding a boolean column to an existing table it may be required, because adding non-null columns requires a default in most cases. A newly created table however doesn't have a technical need for a default value for non-null tables, and it seems entirely plausible for a column not to have a good default value (whether it's an integer/string or as in this case a boolean).