It’s not really bad for you; it only depends how long past about 30 you want to live. Evolution only cares to where our children could mostly live on their own, and then we were valueless.
The rest has to be done with diet, exercise, and using our brains to extend our species’ lifespan.
But yeah: go crazy. Don’t get vaxed, don’t wear seatbelts. Don’t eat as well as you can, don’t work the heart and the joints and the muscles, don’t foster and build relations for a strong community that cares for one another, don’t contribute to education and medicine and safety and enrichment. You’ll be fine…
… until just after your evolutionary best-before date of about 30, if you did nothing to extend that.