> Landing on the moon is a very different endeavour than simply reaching Earth orbit from Earth. In order to refuel and reuse rockets on the moon, you'd need to build out all the infrastructure for doing so first, not to mention the resources necessary for continuous operation. Even getting running water on the moon would be a huge logistical and infrastructure challenge, let alone operating a launch pad.

Anyone that wants to intuitively understand these challenges can simply play Factorio's Space Exploration mod (https://mods.factorio.com/mod/space-exploration).