More like a shakedown, not a joyride. Artemis 2&3 are similar to Apollo 8-10. Practice, cautious testing. Yeah we've been there done that, but it's been 50 years and we've got a new ship we've got to run through its paces.
Space is still hard.
Aside from just "neat" we always have more to learn. The last Apollo mission was the only one to carry an actual scientist, prof. Harrison Schmitt. Artemis stands to do a lot more actual science overall. We still don't know how the moon actually got there.
As to what if anything useful we actually get from this, the same stuff we did the first time really. Though arguably much less economic gain.