Sure, we don't understand much detail but we know a whole lot of things like "you're x% more likely to get y disease", and if y is something that can be monitor

Sure, we don't understand much detail but we know a whole lot of things like "you're x% more likely to get y disease", and if y is something that can be monitored or tested for, this can literally save your life. BRCA and heart disease come to mind.