If you are going to southern China you wouldn’t be save so much going over far east Russia anyways, I guess.
Also, Chinese airlines can’t overfly Russia on the way to the USA, at least for newly approved flights: https://www.reuters.com/world/chinese-airlines-avoiding-russ...
Just 12*2 weekly round trip flights between the USA and China really sucks. There were a lot more before the pandemic. But it seems like we are going to 35 soon? https://simpleflying.com/us-china-lift-number-weekly-flights.... (Or already?)
When you visit there is lots of chaos, like people parking on sidewalks when they aren't supposed to, or driving the wrong way down a street and no one even batting an eye, or obvious brothels advertising out in the open. Like, if the Chinese government can't even control these simple kinds of things, why do you think they are going to try and control much harder cases?
However, as patio11 said (and surely not the first), the optimal amount of fraud for a payment system is non-zero. Profit is higher when convenience is prioritized over security.
Similarly, it seems the optimal amount of crime for a government is not zero either. Everyone breaking the law allows everyone to be dealt with as needed. Sure I keep a low profile, and they probably have a full profile on us already, but it doesn't feel satisfying helping out.
On the other hand, despite my better judgement I let Japan take photos of me, etc. Who knows what they do with them.
Japan in comparison is much more law and order from the start, and mostly the opposite. Japanese Police will search your stuff just to look busy, but they are never going to unnecessarily persecute you.
Assuming you're flying from eastern US, taking the pacific route to bypass RU airspace instead of the polar route doesn't add that much distance to get to coastal China.
And Chinese airlines can still overfly RU.