People are very good at justifying what they are doing if their livelihood is at stake. I know many programmers - nice people - working as the digital equivalent of seal-clubbers... but there's good money to be made clubbing seals, and if they don't do it somebody else will, and the seals have a choice not be clubbed, and they need the experience, and they only indirectly club the seals, and remember that time when that "good" guy did a bad thing for seals, and also there's WAY worse industries, and there's this one study that suggests clubbing seals is actually good for society... etc etc!