Earlier quoted context omitted.
Because one is an urgent need, the other isn't and also presupposes a solution to the first problem. Perhaps you can explain why this doesn't matter.
I dont see that way at all. Space exploration in no way hampers or restricts our ability to improve earth. The two can be done in parallel. Do you think that all non-urgent activities should/must be halted until the earth is improved?
Except for the logistics, such as funding, brain drain, social attention/PR. Frankly, I don't think we could "improve Earth" effectively without major restructuring of power, resources, social attitudes, etc., even if massive amounts of resources were thrown at it. People would rather work on space exploration because it's more exciting and hopeful.