I found even more sketchy things. At least on macOS, I'm not able to turn off that preference for contacts saved in my address book, it only allows me to uncheck it for collected addresses. I think I understand the thinking behind not setting this pref to `true` for collected addresses because users might be writing to a contact that they necessarily don't want to trust, but when we save a contact into the "Collected Addresses" we don't autofill the Display Name. This unique option for each vcard that can override the global "Show display name for known contact" is definitely confusing.
Bug 1894048 Comment 8 Edit History
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I found even more sketchy things. At least on macOS, I'm not able to turn off that preference for contacts saved in my address book, it only allows me to uncheck it for collected addresses. I think I understand the thinking behind not setting this pref to `true` for collected addresses because users might be writing to a contact that they necessarily don't want to trust, but when we save a contact into the "Collected Addresses" we sometimes don't autofill the Display Name (sometimes it fails and I'm not sure why). This unique option for each vcard that can override the global "Show display name for known contact" is definitely confusing.