I really don't know.

If i put on my total conspiratorial cap (tin foil, of course) then Binance:

• are a Cocain Import Agency puppet for collecting data.
• doesn't have the coins they say they do.
• are out to control or destroy bitcoin.
• did this to say it was theft, and not that it never was.
• is trying to collect insurance money.

The same thing happened with Mt. Gox, but it really only became clear with 20/20 hindsite. The timings and sketchiness was there.

I really can't say what CZ's intentions were.