A thought on leaky abstractions and theology
I wonder if the "simple" truths of Scripture are really just abstractions and they sometimes leak (see this), which is why we need people who study and sometimes explain the complexities of theology, for the times when people's lives don't fit neatly into the abstractions.
Simplifications
It seems to me the "simple" truths are certainly simplifications, and that abstractions are a type of simplification. (I'm not quite sure that the "simple" truths are abstractions, though.) A simplification almost by definition won't cover all cases because it excludes everything but the central tendency.