I call Bull crap. I'll bet money they are nothing other than embarsasements to government officials.As you've probably seen in the press, there are several levels of classification. The documents that are Confidential might well be questionable as to whether they needed to be classified; sometimes the system errs on the side of protecting at that level. But, above that, the classification markings are without doubt there because they reflect the damage that will occur to national security that will happen if they are disclosed. Disclosure could happen if they were mishandled or randomly declassified for convenience, so either scenario is equally bad. On the other hand, we really don't know the breadth and depth of what is in the documents and probably won't in our lifetimes. If they are focused on one particular subject area it would be one thing, still likely serious. If they span across broad range of subjects, much more serious.
I don't think anyone who has not been cleared and had access at TS and above can appreciate the care with which these documents are usually protected and the types of information they contain. I'm guessing you won't take my word for it but the seizure really had to happen. The proven existence of a cache of a large number of classified documents couldn't be ignored.