The next frontier of lunar exploration is gonna be lava tubes, and neither NASA nor ESA are gonna use humans for that (at least at first). I agree that nothing but SLS can put humans back on the Moon, but I still think the money would be better spent on robotic missions that could do all the same science, and then some, without the added cost of human-rating or the added risk (or eventuality) of deaths putting a damper on mission goals.

I still don't understand why putting humans on the moon again is on the table besides "well China says they're gonna do it, so... we gotta do it first to stake a claim."