Other species don’t need clean water, clothes, complex tools and growing food. This makes their life simpler yet limits their number and habitat.
Try to live in a village growing own food. It’s a hard work, especially if you have cattles or other domestic animals. Villagers work from early morning to evening because there’s a lot things to do. Living in a city is much easier.
This game looked like a scam before release. The developers copied art style and their trailer scenes from other games, and never shown gameplay videos. In the trailers it looked like AAA, but was developed by a studio without required experience. There were doubts the game existed at all. Well, it existed, but was far from what trailers shown.