LOL. Does anyone actually believe that?
"The United States and China agree that neither country’s government will conduct or knowingly support cyber-enabled theft of intellectual property, including trade secrets or other confidential business information, with the intent of providing competitive advantages to companies or commercial sectors" [1] (emphasis mine).
Not a meaningful commitment since the U.S. does not (officially) do this and the concept of a purely-commercial Chinese company defies delineation.
[1] https://obamawhitehouse.archives.gov/the-press-office/2015/0...
There are certainly challenges, but the threat/intelligence communities have made a lot of strides in attribution.
If you can attribute attacks, you can retaliate with sanctions, etc. So if you are credible in your threat of retaliation and the retaliation is meaningful and proportional, reducing cyber conflict may be possible.
This is certainly a challenging topic, but to draw a parallel; many people were sceptical of the Iranian nuclear deal, but even the Israelis admit that the Iranians look to have stopped developing nuclear weapons capabilities.
It's incredible that people thought Iran would risk devastating sanctions just to pursue a risky nuclear program that would remain open to foreign intervention and espionage indefinitely. If Israelis really want peace, they might consider electing a government that actually promotes that.