I assume you typoed and meant to ask “why aren’t” instead. We aren’t because the Saturn V moon rocket (and related projects) were consuming over 4% of the US g

I assume you typoed and meant to ask “why aren’t” instead. We aren’t because the Saturn V moon rocket (and related projects) were consuming over 4% of the US government’s budget, way more than even the SLS and definitely more than the Falcon Heavy.