@Always_Ask_Questions I was responding to the statement made above that there is an inherent difference to Jewish biological makeup in regard to medical treatment, as attributed to the Chasam Sofer based on a gemara regarding Jewish vs. Non Jewish zera. I agree with what you are saying, there will be basic differences between ethnicities and groups based on diet, geography, lifestyle, etc. But there isn’t much of a biological difference between Ashkenazi Jews and say, Middle-Eastern Non-Jews.
We have surprisingly little shared DNA with Western-Europeans. Most is from Italy and Germany, which is where most of us “shtam” from. As persecutions happened we moved Northwest from Italy and Lower Germany but did not have as much mixture with non-Jews
That isn’t to say we don’t have distinct DNA, we do. In fact, most of Ashkenazi Jewry can have their DNA traced to about 350 people in Germany in the 1300-1400s. Which is why there is a relatively high number of Recessive diseases among Ashkenazi Jews. Be that as it may, we still do not differ much from the Non-Jews of the Mediterranean area. (arabs, etc.)
The point I was making about converts ws that according to what @UJM said, there should be a genetic change when someone becomes a Jew, That is to say, a doctor who is treating a recent convert shouldn’t assume that what worked earlier would work now, because the man has changed from Non-Jew to Jew.