what's the argument then?
I thought the main complain here was that Zoe doesn't look like Nichelle "enough" but then different actresses are proposed for the role (eg., Lupita and Kerry) who look even LESS like original Uhura and, apparently, new Uhura wouldn't need to look like Nichelle... Did I miss something?
I struggle to imagine other actors playing these characters better than the ones who actually do play them because I
never saw them play them (or at least similar roles), I have nothing to judge. It seems, therefore, a pretentious, baseless, comparision at the expense of the one and only person who does the job, without having anything to compare others with.
I'm unsure about what this kind of opinion is truly based on, beside someone just liking an actor personally and wanting them to play an important role regardless having any actual evidence that they'd do that well, or better than the actor who got the job. It seems a moot point.
For example, someone who loves Adrien Brody could argue he'd make a better Spock than Quinto (Adrien had been in talks for the role), but how do you even
know that? They are both good actors but in the end, Quinto is the one effectively playing Spock and making the effort to be him. Adrien's supposed ability to be a perfect Spock is just an abstract idea probably based on his physical appearance more than anything. Sure, unlike the Uhura dream castings from above, Adrien has played roles that might at least suggest that playing Spock could be a familiar territory for him, but more often than not an actor isn't necessarily perfect playing ALL similar roles.
In the end, JJ wanted Zoe and was willing to wait for her to finish avatar because she had something and provided something that other actresses from the casting didn't have. She was his Uhura and gave him what he wanted his Uhura to be, and Nichelle herself has only love and admiration for Zoe and was super happy about the casting.
I guess the same happened with the others too.