Morne Morkel

What has Morkel done to be considered untouchable?
De Wet bowled really well in the first Test and should stay in the team. Ntini has nearly 400 wickets in 100 Tests. I personally don't like quotas and all that as i think the best should play, end of. However, i'm not South African and I wasn't there, or even close. So for political reasons, maybe Ntini should play. I don't like it, but there you go. I'm a fan of Ntini, so for me i'd drop Morkel if Steyn is fit