Just speaking for myself, I never felt alinated by the frequent race lifts the MCU has done with their characters in movie and films. I saw no one making any complaints about Samuel Jackson being Nick Fury when the character has been white for 50 years prior to his casting. Now Black Fury is the norm and the character is functionally no different. Getting mad about this honestly feels like a nitpick.
I’m all for creating new characters if the character is actually new. If there’s a pre-existing character that already fills that role just use that character. DCAU did this a lot. We got Summer Gleason when they could have used Vickie Vale. Got Jax-Ur instead of general Zod.