There have always been differing medical opinions, so allowing patients to cheaply sample many in order to rapidly get to the end is better than having a one off rarely in practise used test because it's prohibitively expensive.

The FDA are simply enforcing the medical industry monopoly on diagnosis. You can expect any potentially disruptive effort along these lines to also mysteriously fail to ever be approved.

23andMe could sell their product as not being diagnostic. Since 23andme chose to sell their product as being diagnostic it's fair enough that their held to the same level of regulation as everyone else in the sector.

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