It's because as soon as people militarize space nobody can get anything done in space. In space you are so much more vulnerable than in any conceivable environ

It's because as soon as people militarize space nobody can get anything done in space. In space you are so much more vulnerable than in any conceivable environment on earth. Survival depends on others not having layers of other agendas, several of which may be to find ways to kill you. Imagine how much space exploration will cost if not only do you need to get to space, but you need to bring defensive and offensive weapons as well.