I think it depends what the lower limit of this technology is in terms of cost-per-ton. If the technology can get 100X cheaper, it would be immoral not to pursu

I think it depends what the lower limit of this technology is in terms of cost-per-ton. If the technology can get 100X cheaper, it would be immoral not to pursue it. If it only gets 2-3X as cheap as it is today, it might create the moral excuse you cited and be a net-negative. My instinct is it could be an extremely important technology for fighting climate change. And while it develops it's important to continue to insist that it doesn't excuse the emissions it might offset.