This would allow to easier choose the correct task that is to be linked with the new task, as task name alone is not sufficient (I often times have the same task name, but different custom field, and only through the custom fields, i now what task to link. Currently i have to go memorise the task id, so id be sure its the same task i want to link.
This is also great for any CLickUp Add on (Google Chrome and FrontApp).