We could easily send a bunch of low cost probes to the Moon to collect more data. We can even get samples back robotically - China did that earlier this year.
There's no need to spend billions on spending three or four people there to get scientific returns.
Building a architecture to sustainably send human places will also enable a lot of other things. Having a 100 ton lander allows you to send far more then tiny probes. And we know well that actual humans exploring and looking for samples is better in many ways.
Getting humans to have long term sustainability and mobility on the moon and having tools and robotic support is long term.
The same architecture can then be reused for Mars.
On earth, most caves are explored with humans. Most science is not done by robotics only.
There's no need to spend billions on spending three or four people there to get scientific returns.