@Hockeycowboy - what about diseases that have nothing to do with genetics? Diseases caused by obligate parasites, for instance?
https://en.m.wikipedia.org/wiki/Obligate_parasite
No sickness implies no parasitic infections. No parasitic infections implies no obligate parasites (since they die without hosts). So where do you think they came from?
https://en.m.wikipedia.org/wiki/Obligate_parasite
No sickness implies no parasitic infections. No parasitic infections implies no obligate parasites (since they die without hosts). So where do you think they came from?