According to the writer, what challenge does this upbringing present to the black artist?

From the text:

This young poet's home is, I believe, a fairly typical home of the colored middle class. One sees immediately how difficult it
would be for an artist born in such a home to interest himself in interpreting the beauty of his own people. He is never taught to see that beauty. He is taught rather not to see it, or if he does, to be ashamed of it when it is not according to Caucasian patterns.