In America Nigga is in our lexicon because that's what we were called every day as a word to demean and oppress us. Also slang and language changes over time so if people are going out of their way to speak words that are empowering, the opposite oppressing and demeaning words, how can that be considered corny?
We were called nigga every day and fully adopted what it means to be a NIGGA. Now we can call ourselves something empowering everyday and fully adopt what it means to be empowered. If it's said regularly it will become apart of our lexicon. Just like nigga and everything else.
What kinda persona do you believe people are trying to cast when they say king/queen?