Anyone Else Feel Guilty About Changing a Sim's Genetics?

I do feel guilty if I do that, but it doesn't last longer than the active session. And I only ever feel guilty when I do it to naturally born sims. Often enough I create my sims's offspring in CAS via play with genetics so that they meet my expectations. In general I do not mind ugly sims, rather it's small things that I edit, like giving all Fyres grandkids red hair, reducing the abs on sims that just grew from child to teen or countering my game's tendency to make children of mixed couples white.