Even 30-40 year old adults often fail to deal with the emotions triggered by this game, it's not hard to imagine how bad it can be for a kid, especially at 5-6 years, when most can barely control their basic feelings.
I'm not amazed that some kids can show impressive mechanical skills. It's kind of normal, as children's brains are like sponges for the first few years, absorbing large amounts of information which later becomes the foundation for more complex stuff. This is the same reason why a game like Apex can easily inflict psychological damage on the little ones, with long lasting and serious effects. This game is not good for the little ones at all, there are tons of much better suited things for them to do at that age.
Remember, those who grow up with Lego become creative devs, while those who get smartphones as gifts at 2 grow up as spoiled brats, forever crybabies, the Karens 🙂.