Okay I did a bit of research along the line you said. From what I can find it seems the basis of Finland's school system is that not all students are equal. Report cards are based on individualized grading by each teacher. (https://www.theatlantic.com/national/archive/2011/12/what-am...)

The idea behind banning gifted/special programs is to treat all students equally with equal opportunity and the same curriculum. Individualized grading by the teacher completely violates this idea.

So I am still unsure what point you are trying make. Based on my research Finland clearly rejects that notion of teaching and grading everyone the same.