I honestly feel like she's somewhat of a dogmatist regarding this
If you are creating ideal compost, that is well balanced then it is nearly impossible to incorporate too much.
However, if the compost is out of balance (meaning acidic or basic with little of the good biosphere) then you can indeed have too much of a bad thing.
The other mistake is to use anaerobic compost as the main component, this tends to harbor far more "bad" microbes and their complment critters than "good" microbes and their complement critters resulting in an imbalanced soil system.
Jeremiah Squingelli wrote:Has anybody else had strong success with anaerobic tea? Ingham is very confidently insistent that anaerobic tea or compost will kill your plants, and yet I've used anaerobic tea that sat in a sealed barrel in the sun for several months and smelled like septic tank and my plants only thrived, and I know other permies like morag gamble use an anaerobic comfrey tea to success, and there are also more traditional methods like bokashi.
I honestly feel like she's somewhat of a dogmatist regarding this