I assume you have a reference that I can use to confirm your claim? If so, it would help if you would post it.
But even if your claim is true, so what? You're skirting around the real issue here, and that is that this is a drawn piece of artwork depicting a scene from ancient mythology. It is not a photograph and therefore is not harming anyone.
But since you're so obsessed with people keeping safe from dying, here's a list of things besides incest that you should abstain from, because all of the things I'm about to list could potentially kill you...
1. Going to the grocery store... you could potentially walk in on a robbery in progress and get shot.
2. Taking walks outdoors... you could potentially get hit by a car, or a train, or get kicked in the head by a passing horse (depending on where you live), or get bit by a rattlesnake, or stung by a scorpion. Therefore you must avoid ever leaving your home because you might potentially end up dying as a result.
3. Eating. This is an especially deadly killer, because you might potentially choke to death or the food might go down your windpipe instead of your esophagus, making you unable to breathe. There might potentially be salmonella or e. coli in the food you eat, or some psychotic asshole might have potentially laced it with cyanide, which would make your food an instant death sentence. Oh noes!
4. Drinking water. People drown in water, people choke on water, people can drink too much water and die as a result.
5. Remaining in your home. Statistically speaking, most fatal accidents occur inside the home, so you MUST stay as far away from your own home as you possibly can in order to avoid potentially getting yourself killed.
6. Using electrical appliances. You could potentially end up electrocuting yourself, therefore you should never ever use electrical appliances.
7. Breathing. The act of inhalation can also send your own saliva into your windpipe, making you cough uncontrollably to the point where your body simply can't take it anymore and you might potentially die.
8. Being born. That's right, this is the biggest killer of them all, because statistically speaking, 100% of all animals born, end up dead. That's 1 out of every 1 animal (including humans) born, spawned, hatched, whatever, into the world around us.
Or you could just forego all the fear of death and paranoia you're exhibiting and enjoy what you do have. But maybe you enjoy your paranoia that something you do might kill you. I'm not one to judge... in the meantime, I'll continue enjoying these masterful works of art depicting incestuous relationships between consenting adults. And as I said before, you always have the option of not looking.