I hear you, although I would argue that someone with her position should have been the first person to know whether what they were sending needed a security designation or not.

The fact that 10-15% or so of those emails needed a retroactive security classification demonstrates that she held either had a cavalier attitude toward guarding that information, or was simply incompetent in knowing what should and should not have been classified.

Whether that rises to the level of a criminal act, I suspect, depends on whether any of the 30k+ emails she deleted, claiming they were personal, also contained classified material, because then the crime is lying to the FBI more so than the reckless handing of classified information.