Well, I can't source precisely that phrasing. But imagine an engineered ecology that is: less cruel than a naturally evolved one; as diverse; also includes some 'dinosaur-killer-sized' asteroid impact aversion system that prevents global scale mass extinctions. Wouldn't you find that ecology more beautiful than a naturally evolved one (that we have now)?

Given humanity's track record, my imagined idea of an engineered ecology is not so rosy as yours. Who would do it, and what would their motivations be?