I've seen your posts relating to this topic around the forum. They do seem particularly singular-focused, and you seem a bit excessive in your harshness against what you criticize. You do you, but I do want to express why you see humans and human-like creatures in abundance.
Humans have human-like intelligence, obviously. And human-like intelligence serves humans well because of the needs and attributes humans have. In real life, we do not see this type of intelligence in other creatures because they AREN'T human, they have different needs, and they have different goals. I'm not alone when I observe the cliche of giving non-human things human-like intellects. It doesn't make sense and the entire concept of human-attribute amalgamations a double-edged blade.
Now us, being human, relate best to the trials and tribulations we have as humans. We don't relate much to 'temperature is wrong, dig down, move eggs', 'egg-layer smells of needing food, bring food', 'smells like sister ant, follow scent'. Actual animals with their animal concerns are not very relatable compared to the complexities of human society and existence. Most people want to connect with things in a human way, we even do this with our pets. So when people create characters that we are meant to connect with, they are given varying degrees of human characteristics, leaning heavily towards human. Even if you have an ANT in your party, and it does ant-y things, it will also do them in a HUMAN way and with a human-like perspective.
TL;DR Humans relate to humans, so characters will always gravitate towards human characteristics by design.
Now, I LIKE when people are creative enough to make a character that is truly unconventional. And an ant certainly fits this. But it is a little odd to complain that humans are creating too many things that they relate to as humans. There ARE a lot of games out there that are pure mechanics with an animal skin on it. Ant colony sims, click-on-flies-to-make-the-frog-eat-them mobile games, and the like. What this thread refers to is RPGs, and the very nature of RPGs lend themselves to gravitating toward human-centric experiences.
Someone could make a game where you play as a wolf. You could hunt down deer using a scent system. You have no visual indicators, just a general move around the map and smell more or less deer scent. When you track down the mother and fawn you enter combat and attempt to damage the fawn until the mother runs away, then eat. Instead of MP, you have a hunger meter that continuously drains. And your HP gradually restores, so long as your hunger isn't drained. You could even acquire a pack, each with their own needs for these resources. ...and so on and so on. But...
It will not resonate nearly as much as a murder mystery, political intrigue, crime thriller, or any other human experience story. So expect them. ...And make the kind of game you want to make.