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, we need to do things like space exploration because these are the endeavours that advance humanity. Even in practical terms, plenty of discoveries that are useful here come from technologies developed for space exploration. If you're really worried about unproductive use of resouces, maybe worry about how we deal with the pedo elites that rule over us and hoard resources on unimaginable scale.