DNA damage is not a major issue at all. Most of the damage can be "reversed" by looking at your close relatives since it's single nucleotide mutations. Right

DNA damage is not a major issue at all. Most of the damage can be "reversed" by looking at your close relatives since it's single nucleotide mutations. Right now you can't even get the genome sequenced without gaps for a reasonable price. The current $1000 genome is 30x coverage which leaves some parts unsequenced. You can probably infer what some of those sequences should be, but that would be much harder than reversing potential DNA damage over your lifetime. But even if we had the whole thing sequenced, modifying DNA in some or every cell is definitely not easy and in some cases impossible. Also, all current methods have all kinds of side effects. Finally, even if you had some dangerous DNA mutation reversed, it may not help if a mutation induced cascade already began.