Why shouldn't designer babies be available to anyone who can afford them?
Yup, its defiantly coming. I think it will be a while before average people start selecting embryos. For quite some time its only going to be something that people with a family history of genetic disordered will do. Developed countries will place strong guidelines and regulations on such procedures only being done where there is a history of genetic disease. Eventually though, some scientist will set up shop in a country with out such regulations and the super wealthy will travel abroad to get access to such family planning technology. Once the cost is low enough, countries will face pressure de-regulate the practice so that average people can have access to it.
I'm not trying to make an ethical argument as to wither anyone anyone with the money should be able to get a designer baby or not. I'm just making a prediction that such technology will, for a period of time, only be permitted to couples with a family history of genetic disorders.
For the same reasons that prosthetic devices are not avaliabe to everyone right now. The technology Will too focused and too specific for the consumer market. It'll be used to stop children from being born sick or handicapped.
It's not that it'll be denied to consummers it just won't be any sort of practical.
Even if it costs something like $10 million (not practical for most people), rich people will still be able to buy it.
Lets use Hemophilia as an example because almost everyone knows what that is. Nobody would pay for to specify that their child not have hemophilia if nobody in their family has. It's just a genetic disorder that doesn't run in their line.
before all encompassing genetic fixes are around there will be specific fixes. Theses specific fixes will cure things like hemophilia. The only people that would take advantage of that are people with a history of it in their family. Its not a matter of money, it's a matter of practicality. Why pay to fix something that has no chance of being there?