Aram has dark hair and dark eyes.

Illa has dark eyes.

There is quite literally zero reason to think that the Tinkers would visually resemble the Aiel. There are no characters descriptions that suggest it. Beyond the fact that they've spent 3,000 years wandering the world and taking on newcomers and interbreeding, don't you think someone would've noticed by now that "hey, ain't it weird that these Tinkers look *exactly like Aiel*?"

The idea is preposterous.

But you know what? If in your headcanon, Tinkers are supposed to look like Aiel ... *that's fine*. There are probably a million different conceptions of what the Tinkers look like and most of them are not "right" or "wrong".

But nonetheless I am not sure why having literally 1 of the Tinkers cast as an Indian man is some sort of lore-breaking travesty worth noting.