Earth is hostile, too. A large part of human civilization is dedicated to making Earth more hospitable for humanity than it is in its natural state. We can do the same for space.
>Space empty
Only in a sense that a large container with a single fist-sized diamond is empty. It is empty on average. It contains an incredible amount of resources. Our solar system could easily house trillions of people (in O'Neill cylinders).
>for example in projects which research aging, cancer, overpopulation and disaster management in face of global warming
We already spend much more on these, than on space research.
Therefore, instead of hiding, the aliens are going to pro-actively fry every competitor civilization by using their solar shades as a Nicoll Dyson Beam... :-)
>Unless you mean that some data is shared, but cannot be modified, but this would be semantically identical to not sharing anything.
That's the gist of Rust's borrow checker. Shared data can't be modified (unless you use a Mutex or something similar, but then you need to acquire a lock, so data you can mutate is not shared).
Any country that will dear to sink an US aircraft carrier will either have the means to wipe out most of US population too (Russia, China) or just won't care about the consequences (North Korea / Iran, if they think US is about to attack them). In neither case is taunting particularly efficient.
I know someone who programs in LabVIEW for 15 years, and is horrified by the idea that he could be forced to write in a different language, because visual programming is so much better (in his opinion).
>In fact, even just forcibly building infrastructure without putting the groundwork of civil society, democracy and working laws in place doesn't work so much - see Soviet Union.
1. Former Soviet Union countries are much better off than Madagascar.