"If everyone could do it, they would."
Seriously? And you claim to have spent time thinking this over?
First of it's simply not true. Not everyone would do it. Not everyone dreams of selling their soul to be rich and famous. There's other things in life worth pursuing. Speak for yourself.
Second, you're forgetting one very big factor: simple chance. I won't call it luck, but i guess a lot of people would. I put kardashian in the same league as Paris Hilton. Everyone could do what they do, but hardly anyone gets the opportunity.
I could do what the king of my country does, except for the fact that princess Beatrice isn't my mother.
As for why people are dicks about Kardashian: she's a demon, set loose on the earth to lower the standards. Google it.