Agreed, I do recall a young Elton Jantjies having a shocking test at Soweto Stadium and thought then that he is still a bit too young.

However, have a look at how NZ does it.
If you are the best, you play, but they do tend to allow the inexperienced players a lot more bench time than game time, and bring on the youth in less stressful situations.

I am sure that Handre Pollard will also be on the radar.