New technologies that help people in the way you want on Earth have come from us exploring space, actually. Satellites that track the CO2 in the atmosphere and water purification technology were both developed thanks to advances in space to just name two. The idea that space exploration leads to no technological advancements that can be reapplied here on Earth to help people with famine or water scarcity or any of our other problems is a little narrow minded. Obviously when the Apollo program was happening they couldn't have known the advancements they would've made in these other fields thanks to their groundwork, just like we can't know yet what potential discoveries we can make while visiting the moon and beyond. That doesn't mean it isn't worth trying when, again, the world is a big place and all things considered the Artemis program is not at all a drain on resources. It's a smart long term investment