8 Reasons Why Inhumans Could Never Replace The X-Men
2. Inhumans Doesn't Work As A Metaphor The Way Mutants Do
Here's the thing: mutants can be read as a metaphor for being different and being part of a minority. Whether it be black, Jewish, gay, trans, mutants work as an allegory for a life experience that many go through. Even without the minority aspect, it works as an allegory for just being a teenager, for feeling weird and different and like no one understands you.
There's all kinds of reasons it works: from the fact mutants tend to manifest at puberty, when a lot of people become more aware of their differences, sometimes even to themselves for the first time, to the level of bigotry and hate that they are subjected to afterwards.
Inhumans huff a magic gas and grow five extra limbs and a special goop spewing eye that makes rainbows.
Okay, that one isn't an actual Inhuman, yet.
But basically the allegory just doesn't work with Inhumans the way to does with mutants. By and large, Inhumans powers are so strange that they don't in themselves work as a metaphor for any kind of human condition.
More than that though, with mutants, it works because their difference is part of how they were born. It's natural, it's a part of them they had since birth, even if they don't realise it until puberty.
With Inhumans, the difference is done to them. Way back during the alien genetic manipulation or now with the Terrigen Mists, their individual otherness isn't something they were innately born with, it was something done to them.
And that becomes problematic when you try to set up Inhumans as an allegory for being different.