I'm going to assume that you were writing about Jonathon Frakes. He started working on "Star Trek: The Next Generation" in 1987. He studied with the crew behind the scenes and eventually directed multiple episodes of the show. Nobody questioned him as the director of the film because he was one of the most prominent stars of the television show that the film was based on!
Comparing Frakes directing "First Contact" to Nia DaCosta directing "the Marvels" doesn't make even a tiny bit of sense.
I don't have a problem with DaCosta being picked as director, nor do I hold it against her. then again, I have already compared MCU directors to mere bus drivers for a rock band... and overtly stated that directors for MCU films are of less importance than they would be for any other studio type of film.
veteran Director Albert Hughes explained why he chose not to get involved... because he realized that he wouldn't enjoy working under that sort of system. would he probably have made a good "Blade" movie? yes. (if those rumors were true) if anything, her lack of experience might be an INCENTIVE for the studio to hire her... so as to minimize the possibility of "creative differences".
to address your hypothetical: if Seth Rogen were directing "the Marvels" I would absolutely question it - since I think he's a bad fit for the material. I suspect, because of his name recognition, that he would attract even more complaints, questions, and outright rejection than DaCosta. "OMG, you mean the guy that screwed up the Green Hornet? no way!"
I'm pretty confident that this "everyone" of whom you are writing is merely rhetorical argument. we don't need to create a strawman "EVERYONE" to condemn the thoughts and feelings of others over a film. and the insinuation that any complaints about this film and DaCosta's work on it MUST necessarily be inspired by racism and misogyny. it seems to be built into this franchise culture for some reason. I explained, at considerable length elsewhere, my problems with "Captain Marvel" and won't bother repeating it here. (hint: Sabiha Goecken, Lydia Litvyak, Yevdokiya Bershanskaya, among others)
the bottom line, for me, is that we all get to have opinions and it's okay if we disagree with each other. we're just talking about pop culture artifacts, after all.