For someone who “knows genomes”, this is a brain dead take on microarrays. Lots of the content on arrays _is_ directly tied to a phenotype because there’s limited space so we directly test variants that are known to cause problems!
Is he really claiming that BRCA1/2 variants don’t increase risk of breast cancer in a meaningful way? Or that there aren’t tons of people who are XXY who don’t know even though it’s the hidden cause of many infertility problems?
This is just such a bad take it is hard to take anything said here seriously