Yes, a fire brigade needs to put out the fire. The analog to that in the social realm are non-profits, democratic policies, and grassroots activism. But fire brigades would be really bad at putting out fires if we hadn't studied them scientifically since about the 17th century. We would not know the difference between electrical fires, fires involving oil, and bush fires. Today, woke academics declare some social 'fires' to be bad, others to be necessary, and some to be underrepresented, instead of asking what causes them. I doubt this will lead to a coherent and ultimately actionable understanding of reality.
Fire brigades didn't stand by idly studying from the 17th century until now to act against fires.
Ethics is an old field, and also one that's been applied for a long time. It changed too. For the better even -- since social Darwinism was seen as ethical to some extent at the start of the 20th century.