Space programs has been (and still is I suppose) a competition between nations to show their technology advancements, and although science is fascinated by it there is also a large prestige factor in it. No wonder they aren't going to help the other parties.
Which I think is kinda stupid to be honest. For now we're just studying the solar systems and planets that might be able to support life, but if the long term goal of space programs is to colonize other planets we better stand united on this.
Unfortunately you see similar things happen with GNSS. GPS is owned by America, and they can switch off civilian access at anytime. If that happens millions of navigation devices, parcel trackers, theft trackers, etc. will malfunction.
Russia obviously doesn't want to depend on GPS and so have their GLONASS project. Many receivers can receive both signals and use both constellations for more accurate positioning. However, most GNSS receivers I've come across often require you to have a valid GPS lock (first) and then will search for GLONASS. So this makes those receivers still garbage if America turns the switch.
And Europe will join this battle with GALILEO as well.
China has their own system "Beidou" which is exclusive to China, because the satellites don't orbit the complete earth (afaik).
There is a large military factor for these programs I suspect, which is unfortunate with aforementioned ethics in mind.