How Isolated was Ms. Clinton?

The former Secretary of State has stated, repeatedly, that she neither sent nor received classified emails on her secret burnerserver.  She also maintains she exclusively used her bathroom server, and no other one.  Which raises a pretty obvious question.  Why not?  How in the world can the USA SoS go 3-4 years without ever being sent, or needing to send, a classified email?   Just look at few of the major foreign policy issues that happened during her tenure;

• Day 2 on the job the POTUS orders all the "black sites" the CIA has around the world closed.
• Feb - POTUS signs a memo promising $20,000,000 in aid to Gaza. GTMO trials are halted. POTUS gives SOTU address to Congress. POTUS gives speech to Marines announcing his plans to pull all troops out of Iraq.
• Mar - PM of the UK visits the USA. Russia goes public with a letter the POTUS wrote and misstates what it says. POTUS sends video to the leadership of Iran. POTUS announces new strategy for Iraq & Afghn.
• April - G20 summit. N.Korea violates testing ban and fires a nuke capable missile. POTUS speaks to Turkish parliament. POTUS visits Iraq. POTUS orders release of "torture" memos and announces no prosecutions will happen. POTUS goes to Summit of Americas.
• May - POTUS fires commanding general in Afghn. Blocks release of "torture" pics.

That's just the first 3+ months on the job and, according to Ms. Clinton, she never sent nor received any classified material during her entire tenure?  Nobody in the CIA, NSA, State Department, White House, Congress, the Pentagon or any of our allies sent her a single classified email on any of the topics?

So, how isolated was Ms. Clinton?

Either she's lying about classified information or nobody trusted her with classified information.