A thoughtful response from a veteran children's librarian. From her blog post:

"So, what conclusions I drew from reflecting on all of the above experiences?

Whether the author or illustrator of a book is of a particular culture matters less than if they do their homework and work diligently to produce authentic and culturally sensitive books. I am hopeful that many authors and illustrators will become more and more culturally aware and do not find such demand unreasonable or burdensome — or, perhaps it is burdensome but not something that can be shirked!
Wouldn’t it be great if publishers encourage or even create professional development opportunities for their sales, marketing, and editorial teams to enrich everyone’s understanding of the importance of diversity, respect, and inclusion?
Wouldn’t it be great if publishers hire more diverse employees to allow for better understanding of varied cultural contents in the manuscripts or illustrations?
Wouldn’t it be easier to verify authenticity and spot questionable treatments if there are enough pairs of culturally sensitive eyes to review and evaluate the books in-house, prior to publication, and not wait to put out fires after the book lands in the hands of the readers?
As consumers, we hold much power in our hands as well. If we keep buying the same-old same-old, and do not seek out or demand availability of the much needed diverse books, there will be no incentives for the publishing industry to heed such need: since it needs to survive and meet the bottom line, after all."