Why are medical expenses broken down into such minutia . . .

What the hey! . . . there are EIGHT separate categories with 5-6 subcategories of medical expenses but who the heII breaks this down like this in there bookkeeping?  We pay insurance and we have a **bleep**load of co-pays and that's all we know. The only thing I record in Quickbooks is pharmacy and all other co-pays. I do the books for someone else and I dont actually see every medical bill and even Kaiser does not break it out to match a tax return when I do my own taxes. . .
I know it's not Intuits fault but how do you tax pros make  it simple for yourselves? Do you just skip it and go strait to the form?