“Good” or “bad” is not contrary to science. For example scientists will evaluate the risks vs. benefits of a cancer treatment to determine if the benefits are worth the risk. They will do the same for vaccine efficacy etc.

Scientists are also humans with their own value judgment which is sometimes very flawed (see e.g. Richard Lynn and his race science) and sometimes with revolutionary insights that expands our shared empathy for the world around us (see e.g. Jane Godall).

Often when I hear a statement like this I see it as a thought terminating cliché. The value judgement of a scientists is often disregarded only when it is contrary (or inconvenient) to the speaker’s argument.