Also T2 is on the rise in young people. Have their genetics changed dramatically in the past few decades? Or has food?
https://www.cdc.gov/diabetes/data-research/research/young-pe...
[1] https://www.thediabetescouncil.com/link-epigenetics-type-2-d...
Many genetic predispositions are behavioral, it's not all pure metabolic effects.
We like to think that our (positive) behavior comes from our own self-made character traits rather behavior that is genetically determined.