Hello Dr. Hunter,
You probably missed the long and productive discussion that Richard Buggs, Steve Schaffner, and Dennis Venema had on Human Chimp Genome Similarity here on the forum. It ended only about a month ago. Schaffner (@glipsnort), a member of one of the world’s foremost primate genetics teams at Broad Institute, concluded that the similarity is actually about 95%. @DennisVenema agreed. @RichardBuggs accepted 95% as an upper bound, although he suspects the similarity measure will be lower when the genomes are fully sequenced.
Thus your critique of common ancestry among primates seems to be based on old, inaccurate estimates that have been overtaken by better data.
Best,
Chris