If it's valid trait that employer (or insurance) finds actually having negative impact - is it really a discrimination (other than you can't really say whether it's expressed).
In the US, it is illegal for an employer or health insurance company to discriminate based on genetics [0]. But if you fail to receive a promotion because your employer found out about your genetic disease, how would you know?
Same way you get to know your KPI's and other assessments?
I guess that act is good after all. No one can tell you've got an actual disease from these tests, even if on big scale the correlation most obviously is there.
Also, in 10-20 years, what if new threats arise?