I had been doing the same thing like many others here for a long time - noindex all these pages on all of my sites.
Then I found myself sometimes looking for these pages on other sites by using queries like ‘abc.com policy’. So I thought these pages, like any other page, should be made and be useful for the users, not for SE. Set them to ‘index’ again. I didn’t notice any effect it has on my traffic, both positive and negative. Thus I just let it be like that for those look for these pages like me.
All of these pages on my sites are copy/paste so yes they are duplicates. However when I check these pages in the Search Console they are all indexed and set as canonical pages of their own. That’s a sign. Google doesn’t consider this type of pages duplicate content.
This is from my experience so it may not work for you.