Said Origin uses archeology sites and two precursors (Zroni and Baol) as well. At first it can be onerous to divide your efforts between the Precursor and the Origin, or the Precursor and the Origin compete with each other to find valid locations for their archeological sites (choose the reason you dislike the least). Normally it is the player's decision to decide what to focus on, simply the Stellaris Staff wants to exempt you from that decision by prevailing the Origin over the Precursor.
At least you have the Mods to save you from the "mischiefs" of the developers