In the end it's your life, your defects that could be on sale and determine your worth in a capitalist society. This is scary because you fate is determined by your birth and some algorithmus that may or may not be correct and some statistical chance that you suffer of certain diseases.
From a capitalistic "I want to minimize costs and maximize profit" perspective it's a perfect fit but the results on society are scary.
On the other hand there are clear benefits to have the possibility to prevent the harm caused by diseases or to adjust your life on informed data about possible risks.
However if you life insurance can buy that data from 23andme or your employer you are fucked and all the talk of equality before the law is moot because some DNA data from you prevents you from closing contracts due to "risk mitigation".
I don't know why anyone would belittle criticism in this direction - it's something that needs to be debated.
I thought about using 23andme but this problems stopped me from doing so. This shouldn't be a for profit but these are the times.