The "system" is set up to advance science. But any system can be abused. Note how the religious community was abused by folks like Jim Jones. But pointing that out is not an argument for eliminating religion because Jones was the exception, not the rule.
The Korean stem cell issue and the others you list are also exceptions, and should not be used to smear all of science, but only to correct it's flaws.
Ask any cop: For every guy you catch, a dozen get away with it.