Cats are nice, but dogs are man’s best friend for a reason. Some cats will defend you, but most dogs are ride or die. And they can read you emotionality, just like we can read them.
Your DNA mostly isn’t yours anyway. Your siblings are largely the same. I did a 23 and me years ago. No regrets yet. I’m eventually going to die probably in 40-50 years. I just don’t see how it can be used against me.