@fresco,
Quote: To ask whether this is "good" is somewhat vacuous
Im stepping lightly on this issue because its fraught with all sorts of new realities that will become a mere matter of course in our future medical practices. SO, even though DAvids questions are somewhat naive, they are something that we will have to deal with even with the most benign medical ethics.
Continued artificial selection , especially driven by gene therapies will expose unintended consequences so that mechanical interventions that ros has speculated on may be the normal daily med procedures. EIther we will use "designer genetics" or else mechanical interventions to maintain even the most serious illness today, into a chronic state where it can be managed until the next generation when the gene therapy will wipe out the disease's tracks. By that means, I can see entire industries that are either intervention or genetics based being at cross purposes to each other.(A pancreatic insulin delivery nano tech system will be at cross purposes to genetic intervention to remove insulin response fromthe genome)
However, I dont think its gonna be cheap. People with say TEy Sachs, may have available gene therapy on a case by case basis until the recessive nature of the gene combination is gradually removed . Either that or a single generational intervention of gene therapy will remove the entire syndrome. HOWEVER, when the Tey Sachs link is removed, so are two or three BENEFICIAL variants taken out of the genetic structure.
SO many genes are multifunctional . So we will remnove the TAy Sachs and increase the Chrones disease or dietary allergies
HOWEWVER, weve not even approached HOW we , as a civilization,can control the implementation of our abilities to create designer babies and reduce the culling of our own genetic diversity which will put us to major risk by turning our species into a bunch of farm animals , like turkeys, where we are responsive only to complex interventions and mechanical devices .I fear that, after weve become a race of turkeys should any serious environmental change occur, we could be "Bottlenecked" and wiped out by our own lack of diversity.
NATURE ALWAYS BATS LAST.