I am nowhere near an expert on this matter, but probably more informed than the average Joe. What always strikes me in these kinds of debates among non experts is - as outlined in the article - how people equate genetics to certainty. This assertion does not hold up at all once you start taking an even superficial look, but most people never do that.
If you justify this kind of screening on todays data, that most likely overestimates the penetrance for most conditions, you also cannot undo it in the future. If you start screening now and after 30-40 years it turns out your lifetime risks were off by a factor of 3, you still have created a generation that (possibly) underwent extensive and invasive screening, waiting for a diagnosis.