All ASE official maps are crowded and overloaded with dinos and super structures for massive dino breeding. Don't let ASA or ARK 2 get to the same state.
Disabling mating is a legitimate way to control the dino population, maintain the game challenge vs breeding creating super dinos, force new players to play the game and tame vs receiving/buying super dinos on day 1, make the wider range of native dinos more valuable since dinos will all stay closer to their original stat range. If someone wants 40 dinos they only need to tame 2 then mate them, but this way they will have to find, tame, and actually play the game to have that many dinos.
Unofficial maps have great controls to prevent overpopulation and server lag, this is missing on official maps.