Designer babies

What if you could ensure that your children would not be plagued by the inheritable disease you suffer from? In Britain, now you can.

Predictably, there are some people who think that this sort of screening should be banned. I don't see any of them volunteering to adopt cancer-ridden "snowflake babies," though. Their objection can't possibly be to the destruction of embryos, as this occurs with many IVF procedures that don't involve genetic screening. My question is this: is gene therapy a form of eugenics? Are the same scaremongering ethicists who try to keep people from having healthy children via genetic screening also opposed to gene therapy?