It's offensive that he was given the role because he's buddies with the director, not because he was great in the audition or even because he's the best fit for the character.
'happens all the time' doesn't make it right, and doesn't mean I have to like it.
This tells me the character, and by extension the story, was an afterthought. Hiring the director's buddy and possibly cashing in on the stirrup they'd known a race change would cause, were the more likely primary motivators for that move. That's a clear indicator of misplaced focus, and it didn't, and still doesn't, bode well for the production as a whole.
This is what Michael B Jordan sang to Joss Trank to ensure he got a part in this movie:
"Cast me if you can" to the tune of "Get here if you can" by Brenda Russell (later performed by Oleta Adams):
You can cast me the crony way
You can cast the old fashioned way
You can cast me and not explain
Why you cast me, I don't mind
You can cast me as Mr Fan
Heck even Willie the Mail Man
I don't care how you cast me
Just cast me if you can
You can make me into a goat
Or Human Torch would really smoke
Let's head on down this slippery slope
And make this casting mine
You can cast me upon a whim
Even make me ol' Benjy Grimm
I don't care how you cast here
Just cast me if you can
There are fans and studios between us
Always something to get over
If I had my way, surely you would be closer
I need you closer
You can cast me against the norm
I don't mind being Susan Storm
That will pop the fans' big balloon
But you better cast me soon
You can cast cause you have a say
The fans will see this movie anyway
I don't care how you cast here
Just cast me if you can.