I'm not 100% disagreeing, but aren't Mantz and Young a lot farther from the front of the race than Ritz and (especially) Hall were? Their times are similar, but marathon times have improved greatly in the past decade, and 2:07 now is about as competitive as 2:10 used to be. Mantz and Young haven't racked up a bunch of top-5 WMMs like Hall did either (although, to be fair, most of them came after Hall's first Olympics).
We so often get spoilt in that our marathoners vastly outperform expectations at the Olympics. Sure, an aging Meb can get 4th. Sure, Jared Ward gets 6th. Sure, Molly Seidel of all people gets the bronze medal. There are some good reasons for this, but it's hardly guaranteed.
So it's worth mentioning that on paper Mantz and Young barely made the OQT and shouldn't be anywhere near the top 10, with an eye to the caveat that US Olympic marathoners do often vastly outperform their on-paper metrics. While this overperformance could happen again, it's also not crazy to suggest that maybe Mantz and Young are who they are and will finish appropriately outside the top 30.