Think about the opposite, though -- most people don't get tested for anything, especially weird/uncommon conditions. Tests like 23andme aren't something your local doctor does every checkup.

For $100, people who otherwise would have been clueless know if there's something they should ask their doctor about. In this case, I think some false positives are better than ignorance.

Worst case, you think "oh no, I'm predisposed to ___!" for a few days until you make it to a doctor who can tell you for sure.

It's fair to say 23andme has saved far more lives than it's hurt.