> Does the CCP really think that the US military are going to use ordinary street msps to target their missiles and that this obfuscation will protect them from on-target hits?

In some cases using consumer-level street maps could make for more accurate targeting.

Many years ago I worked on command & control systems for a US military contractor. The mapping imagery our software used from military mapping providers were high resolution but often more out-of-date than commercial offerings. One example a warfighter showed me stuck with me because it was particularly embarrassing and egregious -- military imagery showed an area with a handful of shacks in the middle of the desert but Google's satellite imagery showed that it had become a sprawling town. Because of issues like that, army warfighters were forced to regularly cross-check with Google and/or Yahoo! maps when planning operations.

It is no longer an area I work in and I would expect that military imagery is now more up-to-date, but there are likely still datapoints uploaded to OpenStreetMap that are more timely and accurate than what government contractors provide. So I would not be surprised if there are still warfighters out there cross-checking with consumer mapping providers before ordering strikes.