Gene editing on humans is certainly a can of worms, but the ethics there are a bit less direct. Its more about a slipper slope than the effects of any one person making the decision.
It is particularly hairy when your modifying your kid who is too young to consent but will be effected by a lifetime. But at least with gene editing, for the most part it is done in the best interest of the child, with an abortion you cant really make that argument,in fact very much the opposite, sacrificing the child for the good of the parent.
We are no where near ethically mindful enough as a species to engage in gene editing ethically. Sadly we **are** quickly approaching the point where gene editing is necessary for the species to thrive at all. It is a dangerous cross roads to be at for sure.
Agreed this is an issue that no one is really addressing well. People either oppose gene editing all together, or take no issue with the current ethics and application and wheres its heading. I dont see any solutions that actually pave a way forward for ethical gene editing on humans.
Then again we seem to have an ethics breakdown recently in the most general sense that is headed towards a train wreck to. The ethically minded have educed everything to such extremes as to be self destructive meanwhile everyone else is so sick of being called a racist for nonsense that they are in full on "fuck you" mode. In the interim the ethical norm in the world slips farther and farther behind.