This is a discussion that's probably best left in some psychology classroom somewhere. Big Brother is not cast based on diversity for God's sake. It's meant to be entertaining, and meant to accomplish that by putting people in a fishbowl and just watching.
Now I've been married for 40+ years and have 8 grandkids. I'm the first generation born in this country as both of my parents were born in Ireland. Does this mean that I should be offended that there aren't more "baby-boomers" (we do comprise about 50% of the population), or overweight, balding Irishmen that still see themselves as Celtic Warriors? Where are all the whiskey drinkers dammit?
My wife and I have been enjoying this show as our summer guilty pleasure since season 2 (with the possible exception of "the season which shall not be named") and laughed, screamed, loved and hated whoever we wanted to no matter what age, size, ethnicity or other demographic label they might be. Somehow, that never factored into the equation.
If the thought never crossed your mind until you read it somewhere, then stop reading there for goodness sake. Forget the labels and just enjoy the show.
For me, I gotta go! We live on the East Coast and it's time for my wife and I to go figure who we're going to love/hate/cheer/boo/etc. Please just enjoy the show along with us