I'm pretty sure we'll see more diversity in future generations. Consider this:
If the people we know are entering "retirement years" (all racial backgrounds), they had started in an era where it was most certainly driven by the white consumer. It's not insane to consider this group had more economic diversity so they were bound to produce more engineers, artists, etc, in conjunction with the other struggles and civil rights being hashed out, leaving a majority of the industry being white driven. No one in the industry is at fault of this, it's just simply how history fell for them.
The generations we have coming up are much more diverse. Those raised in the late 80's to 90's saw, more so than previous generations, a more accepting and cultural mix. I have personally seen an increase in the dynamics of the industry from the inside change over the past few years and it's quite interesting and exciting. From artists to engineers, it's good to see. I would say that in the engineering discipline I don't see as many blacks of any nationality, but I do hope each community (all people) increase the need for STEM which will lead to diversity across all cultures. It is up to us to question the industry, sure, but know that we need to make sure that there is a want as well from the populations we wish to bring in.
Believe me when I tell you there is no shortage of artists in any culture. There's a reason they are always starving. I sometimes feel "EVERYONE" is an artist at some point in their lives. I know that everyone is at the very least a critic.