I would have presumed that security-minded people, which includes those who work in tech, would not so easily give away their genome, and that most of 23andMe's customers are a slice of the general population. But then I read about things like WorldCoin and that people who go to startup parties jump at the chance to give away scans of their retinas and I'm befuddled. Why would anyone willingly do that?
I'm familiar with security (I keep a copy of Applied Cryptography on my shelf for "fun reading") and tech, here's a copy of my whole genome: https://my.pgp-hms.org/profile/hu80855C Note it's a full human genome, far more data than a 23&Me report. You can download the data yourself and try to find risk factors (at the time, the genetic counsellors were surprised to find that I had no credible genetic risk factors). Pl…
One risk if you have PII+genome is that a technically sophisticated entity can determine if you've physically been in a location. Also with an extensive PII+genome database they could find your family, for example for blackmail purposes.
Another risk is that a health insurance provider could deny you based on potential health issues they find in your genome.