Cursed with Intelligence

Say, we are designing a game, possibly a role-playing game and we need to turn character's abilities into numbers. How we can do this? Well, we can say: "If a character can lift 100 kg at max, then their strength will be 10" or "If one can run 10 meters per minutes at max then their speed should be 1". My point here is that, some abilities are easily scalable, so numbers actually makes sense as a representation. A scenario like "Only someone who has 20 Strength at minimum can break this door." is very doable.
But when you try to do this with intelligence, it doesn't work. Because, first of all, what even is intelligence? This is a sincere question. Especially when it comes to artificial intelligence, there is no agreed definition about what makes something intelligent. Problem solving, comprehension, verbal skills, memory, emotional intelligence. Brain is a complex and multidimensional system that we know little about. You can just use any arbitrary criteria and assert "This brain is better than that brain." But what does it even serve?
In real world, we do the same thing using IQ tests. Of course, IQ is not reliable to measuring  intelligence at all and the idea of innate intelligence is always used to justify superiority of certain groups: men, white people, rich people and so on.  People who don't fit into the narrow standards of intelligence are shafted away, left to fail in their lives and even sometimes are targeted for removal.

(FF14 takes an excellent step to make the attribute even more meaningless. To clarify, Intelligence and Mind stand in for "black magic" and "white magic", respectively) (Source)

So then, I ask again, what does measuring intelligence serve, especially when you make them fixed and different between "races" in your game? It doesn't mean game designers have ill intentions, putting certain ideas in your design channels and normalizes to players; far effectively than what you might say by the narrative even. What does your design say when your "low intelligence" characters cannot form even coherent sentences, and when "high intelligence" characters can do everything from discovering the nature of magic to solving hardest math problems?
There is no reason to imply that being skilled in one area is necessarily better than in an unrelated area. Or being a warrior doesn't require thinking somehow, when fast thinking is vital for close quarters fight. Being aware of your enviroment or being good at music is just as "smart" as scholarly skills. No art is isolated from real world, game designers have a responsibility to not to perpetuate harmful and wrong ideas against marginalized people? It's so easy and trivial to kick down neurodivergent people, we certainly don't need to see them in media.
Thankfully, (or sadly depending on where you look)  it's actually very easy to come up with alternative systems, they already exist. Often "intelligence" just means magic ability, why not call that? When you want to measure specific skills, just mention the specific skills: Speech, drawing, emotional skills, decision-making, whatever your setting needs to. Even better, Role Playing Games excel at the feeling of progression. If you put the necessary effort, you can get better. This is often why are players are drawn to, something that daily life under capitalism deprives of most people. Then why make the attributes fixed and repeat why society tells them to players, that they should just stay in their lane and accept the destiny that manifested by their socio-economic status and present this as a fair and natural thing? RPGs often make common people heroes and linking capabilities to being exceptional just defeats this idea. It's a much empowering to suggest that everyone can reach the apex of their abilities when provided the chance, rather than all history revolves around "geniuses". What's the point of escapism when you can't even escape the prejudices of the real world?
The effects of Dungeons and Dragons are still can be felt heavily in RPGs. D&D, like any other piece of media was created in a certain time and certain society. There is no reason to carry the shadow of old ideas. Once again, it is important to think about the elements you are adding to a game. Often it helps to satisfy nerds like me but this time it's actually has weight in society. To put it bluntly, stop contributing to the oppression of marginalized people! Especially when your game tries to be deep in other areas, such easily solvable mistakes end up stinking more.