Well I was just researching evidence of genetic immunity on the premise that your statement wouldn’t be accurate if it included everyone. I certainly did not do an exhaustive study so I may have missed something.

Across the articles it appears there may be no smoking gun in regards to genetics one way or the other with obesity and age being the biggest risk factors.

https://pmc.ncbi.nlm.nih.gov/articles/PMC3746083/

https://hms.harvard.edu/news/protective-mutations-type-2-diabetes