There's a difference between doing your job and earning money as a result vs. finding keys to someone's house and selling said keys to the highest bidder.
I haven't encountered people whose empathy is so perfectly aligned with ethics that they don't need to be taught anything, but I suppose these perfectly selfless people might exist.
However of course in reality, empathy only gets you so far. Should you feel empathy for a CSA consumer because their feelings are important too? Do you empathise with their feelings?
It's true, empathy is a thing worked on, so is ethics by the way.
> but I suppose these perfectly selfless people might exist
I don't suppose you read what I typed. Empathy is not the setting of self aside, but the experience of feeling what someone else would in a given scenario. It is deeply selfish.
I would also say it is a prerequisite for an organized system of ethics.