Why lab & machines can find very limited health issues​

There are two kinds of health issues what people have, one is functional level, the other is organic level. When health issues are in functional level, you can feel, but they cannot be found in lab or by machines because lab and machines can only find organic health issues. All Suboptimal health people are in functional level health issues, they take up 70-80% of global population, that is why we say lab & machines can find very limited health issues.