Now I wonder if you would even feel if your dna gets changed. It is common in fiction to indeed feel that. (and usually it causes horrible pain). But you rightly point out that there are no pain receptors in dna.
Re: consciousness
That is just what the NWO wants you to believe, wake up you sheeple! (j/k)
Consciousness is indeed strange, and the whole idea that we probably do not have consciousness or even free will, that it is all just a survival mechanism is also pretty strange. I also thought that the ‘we are special’ thing is very western. And that in more eastern societies there is a more communal view. (Otoh, I heard about research that says eastern societies are way more tribal, and way less altruistic and ‘do stuff for the good of society’. If you understand what I mean).
But a less individualistic society does explain why a lot of eastern mmo’s are different. (iirc western are more individualistic power fantasies, while eastern ones are more 'you are one cog, fight with these 99 cogs against the enemy 100 cogs).