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Thank you!

Yeah, even if Google links to "the wrong one," either page is still relevant, or it wouldn't have the text in the first place.

Thank you for your response!

No parent pages share child pages, and content even for the few similarly themed pages we do have was carefully written to not be duplicated.

The text on top of every child page does appear on its parent page, so there is duplicate content, but it's the sort of duplicate content that's helpful to a customer.

I have a series of pages on my website organized in a hierarchy, let's simplify it to say parent pages and child pages.

Each of the child pages has product listings, and an introduction at the top (along with an image) explaining their importance, why they're grouped together, providing related information, etc.
The parent page has a list of all of its child pages and a copy of their introductions next to the child page's title and image thumbnail.

Moz is throwing up duplicate content warnings for all of these pages. Is this an actual SEO issue, or is the warning being overzealous?
Each child page has tons of its own content, and each parent page has the introductions from a bunch of child pages, so any single introduction is never the only content on the page.

Thanks in advance!