I just started thinking about it. Why is space exploration even that necessary? They're spending so much money on it when we have so much problems in our own planet..
Yes, absolutely, science in general is necessary for any kind of desirable civilization. Space exploration contributes a massive amount of knowledge to scientific research and betters the human race.
But it shouldn't be a playground for billionaires to plan space hotels for ultra-wealthy clientele. Public works for the public good, for the betterment of our human race as a whole, not just for the super rich.