Originally Posted by Slayven
But they did
They said numerous times if Scarlet Witch had been born anywhere else she would have just normal energy powers. Like Magneto's other daughter Polaris.
Scarlet witch's powers have been retconned by different writers every couple of years.
It was explained as being "chaos magic" for years until house of M declared there was no such thing, only for marvel to reverse that decision and claim yes chaos magic is a thing again, but Strange was lying previously out of fear of Cthon.
AvX most recently declared that Wanda was a universal nexus of chaos energy and a borderline abstract power. It doesn't matter where she was born, that was inevitable.
Her recent solo confuses this even more by creating a "witch goddess" all witches get their power from who is now apparently her mother.
Marvel cannot help themselves from RE explaining scarlet witch every time a new writer shows up because her powers are completely nonsensical.