Why would there be disagreement about what is considered a long time? You are arguing that longer half life = bad, shorter half life = less bad, which misses th

Why would there be disagreement about what is considered a long time? You are arguing that longer half life = bad, shorter half life = less bad, which misses the point. An effect with a shorter half-life could be a lot worse/more dangerous/threatening (potentially apocalyptic) than an effect with a longer half life.