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Biobank is a voluntary data collection system, I thought. It's not based on whether someone is sick.

(Unless I've misunderstood somewhere)

I think the assertion is that most people basically don't feel they have anything special genetically. As such, most people just aren't entering these databases that are opt-in.

Contrast this to people that do have a genetic oddity about them. Just having the traits is often enough to get people to find out more about them.

Perhaps, but it is primarily about allowing researchers to find healthy people with particular genes for their research (most commonly: they suspect a gene is involved in a disease, and while they have plenty of people with that disease and gene, they also need to look for people who have that gene and don't have the disease).

Right, that assertion did not intend on bad intentions of this research. Just pointing out that you can get a selection bias on open calls, as well.

Yes. UK Biobank is a voluntary programme.

(I work in Genomic)

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