As it stands, when you use "find records," you can only update those records and not the triggering record with the data from the find records step.
Example: You want to assign ownership of a lead based on territory assignments. The trigger is creation of a lead record. We find records from a "Territory" app based on the state/region of the triggering lead record. Currently you can only update the territory record, but this wouldn't make sense. We'd want to update the lead record and assign it to the user, where the user value came from the territory record we found.