My son enjoyed going through the queue (maybe a 20-minute wait for us) even though he didn't ride. In fact, we did it twice! But we didn't know he was going to not ride until we got all the way up to the elevators (and the second time, he bolted once we were buckled in).
If you are a huge Guardians fan, then yes I think it might be worth it to go through the line when it is relatively short. I enjoy seeing all the artifacts, video clips, and the pre-show and sometimes wished the line moved more slowly so I could take it all in (I rode right at park close, so they weren't take any more LLs and things moved quick). But this is also my favorite ride ever, so I wouldn't skip the ride part!