I think you should read her books and not rely on soundbites. Also you did not read correctly, because she is essentially saying exactly what you just said.
I agree as well from personal experience and observation. It's not just about adding in nutrients but also stopping the influx of poisonous ones, and also neutralizing/expelling the stored poisons causing the reaction. So you will find that fasting works for some because it has stopped the influx of poison, raw foods works for some people in a different manner, and so forth.
A gross oversimplification would be the cleaner you are the better able to tolerate sun.
Budwig's work in 70 years old now; I'm sure she would have extremely interesting things to say if she were alive now.