It’s already both happened to me that I didn’t notice I couldn’t move a piece without exposing the king or that I won by accident. Had the game not announced this, I wouldn’t have known.
And perhaps the opponent might not notice my mistake either. Or it could just be a strategic high-risk scenario, rather than a mistake.
Why, besides supporting your inability to properly apply the rules of chess?
I mean I absolutely suck at chess (lack of working memory), and it’s clear to me that you are correct.