And here we go again!
That's.
Not.
The.
Point.
They misunderstand how the OLD, ORIGINAL changelings worked. It's not that the new ones are "different", it's that the show factually gets the original changelings utterly wrong.
It's only people who struggle to understand this that, well, don't understand it.
when? There are no original changelinings shown this series, outside the ones in a bunch of jars in a flashback.