You wouldn't make the above statement if you really understood evolutionary theory, but we know you are just repeating the fallacious arguments you have read on some web-site.
Sorry, but I haven't read it on some website.
It stands to reason that if today's biologists state the cheetah's are in danger of becoming extinct because of not enough DIVERSITY in the gene pool (NOT too few individuals) then actually GETTING 'diversity' in the gene pool to begin with is VERY suspicious as well.
Where is the fallacy?