It is a spectacular waste of money in many ways, and certainly sending humans places has a much greater PR impact than the scientific usefullness of the exercise.
However there are things we can learn about the Earth and how to protect it from stuff in space. ie by studying the fate of Venus, why Mars is like it is. These planets are very close to the Earth in a lot of respects and yet they failed to spawn (complex?) life.
Agreed the money could be better spent on feeding the hungry etc. But I'm sure read somewhere that many technologically useful advances have been as a byproduct of the 'space-race'.
So it seems I don't know if it's good or bad. But it is useful.
And I like the Tintin book where he goes to the Moon.
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