Clearly, you think of 'diversity' in the same way as the people who make our annual DIVERSITY AND INCLUSION corporate training products. Where every single shot of an office, warehouse, manufacturing line, or locker room has to include a multiplicity of genders, cultures, and, if at all possible to convey by casting, religions.
In the real world, the business can be diverse even if one small unit of the business is not visibly composed of more than one gender, ethnicity, background, religion, or voting record.
If the studios are asking for 'diverse' hero movies, they're looking for movies that appeal to a wider range of interests than they had previous. That doesn't mean examples of this new 'diversity' need to look like a training video at every shot, or even more than half of the time, in order to be part of this move towards diversity.
Maybe some day there will be an anime-inspired movie with ethnically appropriate actors hired to play the avatars of the animated characters? Then, even if every single face on the movie screen were, say, Asian, rather than white replacements chosen to appeal to a white audience, the movie would be an example of diversity, in the non-stultifying-training use of the term.
