I would imagine the people wanting to cannibalize the only current black lead in the MCU will sleep a LITTLE better at night knowing that Blade and Falcon at least give black boys something on screen (in addition to Luke Cage if he counts). Not that it doesn't suck either way.
It's easy and understandable to say that people should be championing a Spectrum movie instead of Shuri being Black Panther. But again, if the Black Panther movie actually exists with potentially a 50/50 shot at having a female lead while the Spectrum movie doesn't (and honestly probably never will), it's understandable that people will channel their energy the way they are. It's fighting for something tangiable and achievable as oppossed to something that doens't even exist. The later is literally screaming into the void.