So many HN folks defending Huang's actions as "just an affair" - what an epic reading comprehension fail. Yes there is an affair, and that's what grabbed the initial headlines. But just read a paragraph or two and you'll find the espionage story.
For reference, the US has sentenced violators of export laws to decades of prison or even execution in extreme cases (when the Rosenburgs leaked nuclear secrets in 1953, they were sentenced to death). It's just shy of treason, legally. This is maybe one of the largest and most consequential intelligence breaches in history. Anyone who thinks this about an extramarital affair really isn't paying attention. Buckle up, its gonna get bumpy.
Mostly the apologism is for the affair part, not the espionage part. So it kind of lines up with your points about what the important issue is.