There are many powerful arguments for and against genetic engineering and gene therapy.
People with different beliefs may agree with many of these arguments.
For example, an atheist may recognise that the risks of some technologies are too great, and suggest that they should be outlawed if they threatened future human life. However, they might argue that the benefits of other types of therapy outweigh the risks associated with them.
Many religious believers are likely to have great sympathy with the arguments that we should try hard to prevent disease and heal those suffering already, but for some the idea that all life is sacred, including embryos and future generations, may outweigh other arguments, however well intentioned.