Noone hampered their quality... just their source. Indeed, noone hampered that either .... 'cept to restrict the tax dollars funding it. But then, if it's that fantastic, I expect the pharmaceutical companies would be lined up out the door to invest.
And frankly, given some of what I've heard from the mouths of some of the leading researchers in this field .... I'd rather see them hampered. I posted in some long past thread a quote where a spokesman for a lab, when asked about the moral implications of the work done there, replied .... that's for politicians to worry about. Now I don't know about you, but when someone passes the buck on a moral decision to politicians ..... Whoa. I can't remember if the lab was doing cloning or stem cell research ... but personally, i paint the lot of them with the same brush. That kind of thinking is what gave us the atomic bomb.