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What does a “retraction” mean in this field? Are the results of these papers considered incorrect?

It means the publisher no longer host/publish the papers. This can be done at the request of the author or by the publisher in the case of a controversy.

In this case, it seems there is no particular issues with the content of the paper, just that the way the data was collected was not appropriate. A case can be made about the narrow set of data (focused on minority groups) and thus how representative the data is to whatever claims made in the paper. But that require a deeper read into the papers themselves and has nothing to do with the main complain, i.e. ethical concerns.

If the publisher's aim in doing this is to make an ethical statement this seems like a heavy-handed and ineffective way. Let the information be published, make a statement and let the audience decide.

Let the journal decide, it's their journal and their hosting costs and their ethical guidelines for papers they publish. The audience can get it from anywhere else.

Reading the linked article reveals that incorrectness was not the issue, but the unethical way that the genetic samples in the study were obtained.

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