Although many aspects of the human body are well engineered, others, like the human spine (which supports 70% of our body weight on a single slender pole) are quite poorly organized. The vast majority of adults experience back pain at some point in their lives largely because of evolution's lack of foresight. An intelligent engineer could have foreseen the problem, and braced that single column spine with two or three more. But evolution can't look ahead, and is thus often forced to make do.
Is that ribbing of ID necessary? Evolution may be upward or downward. The creation model predicts that organisms will tend downward, hence a progressively weaker spine or disappearing wisdom teeth, for example. What does the evolution model predict?