Correct. The vast majority is dormant/non-coding/vestigial. I could take the code for Doom and package it along side accounting software, set one variable and choose which one to boot into when I fire off the .exe. Even through one would always be totally dormant I can then claim that Doom is 99.99% the same as Quicken. In reality they are barely sharing any code but hey both pieces of software are on the same disk, they are compiled together, therefore they are the same. This is basically what they do, except instead of two pieces of software it's millions of years of genetic baggage.
Nogs and Aryans are both carrying around a fuckton of old (likely corrupted) fish/lizard DNA that literally does jack shit but take up space and cause birth defects/death whenever it gets turned on "but hey they both have it and there is a lot of it therefore everyone is the same." In reality minuscule changes to the code can have drastic effects on the phenotype, it's not how much code differs, it's how it differs.
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