Where is the proof that this was a Chinese hacking group? I certainly don't trust Microsoft to provide it. In fact, it's very concerning that Microsoft seems to be in some quasi-governmental role in this. It's literally a giant security hole in their software, why should we trust what they say? The White House acting as a PR unit for MS (or is it vice versa?) is a serious problem.
If you think the current White House administration and Microsoft aren't on the more trustworthy side of the trust spectrum, then who in your opinion is more trustworthy?