The Fantastic Four HAS a place.
NO matter how diverse the fandom gets-they will always have a place. Just like every single white hero and even those of all races.
The issue we have is when one group (either side) thinks comics should ONLY belong to THEM.
It belongs to NEITHER because like it or not Marvel is not going to stop with diverse books nor white male lead books.
All we can do is offer feedback in a HOPE we see improved quality.
So if a book FAILS it fails for factors outside of SJW Marvel, Entitlement fan hate or low sales-let quality NOT be one of the issues.
60 years of FF gave you that guy in the catsuit with the movie. Along with Inhumans & Silver Surfer.
MAYBE another 60 years can give you that Moon Girl movie. Or that diverse family that goes exploring like the family in Netflix's The Deep.
Maybe we could see a FF foundation Academy that have a diverse cast and rival the X-Men.
Look at history-who would have thought Peter Parker would spawn one of them most success villain titles with Venom? Or Spider- Woman (pick one) or Spider-Gwen or Miles. Or look at Batman-whose family OWNS DC.