We have about 25 years worth of experiments with it in various states, so it’s been well studied. Legislating is a skill that needs to be developed, just like anything else, and a bunch of term-limited newbies have no incentive to do anything except get ready for the next thing, which only enhances the possiblity of corruption.
I think this is exactly what Alito meant by the “domestic supply” of infants available for adoption.