I don't think the anecdote (parable?) requires or implies that no black person would want to become white, just that a black person could feel that way, and wish to keep other blacks from making such a conversion, without being obviously malicious.

At least, I find that view (for black or deaf people) much more understandable than the view that drives the humans in the good ending of Three Worlds Collide [1], which is widely agreed with here.

[1] that view being, basically, that the loss of a planet of humans is an acceptable price to pay to preserve human "growing pains" (romantic strife, embarrassment, etc).