“If the planet went wrong, they would want to wipe it clean. But that could t
ake 500 years. When they revisit – because different visitors would come bac
k and see we’re not doing so well – they would look at these human beings th
at are jerks, that are killing the planet, killing themselves, can’t settle d
own, they’re like a bunch of children. We should wipe it clean.”
節錄來源網站的內容：
工程師本身就會在宇宙間散播生命，但是當這些生命體變糟糕時（破壞星球、變成一群混
蛋），工程師會選擇用黑水清空星球，也是大衛所說的「殺掉除了植物外的生物」。
雷導也談論大衛之所以要清光工程師的原因：
"He hates them. He has no respect for Engineers and no respect for human being
s."
原文網站：
http://www.avpgalaxy.net/2017/05/24/ridley-scott-explains-engineers-wanted-kil
l-mankind-davids-motives/
備註：如果解釋成大衛痛恨這些種族的原因是因為這兩個種族都害怕他們創造的生命能逾
越創造者本身的能力，且不尊重其創造的生命體。那就不難了解為什麼大衛想創造異形。