Ethics is a pretty broad field. In fact, there are ethics tags in IPS, Workplace, Academia, and, of course, philosophy.
Considering that philosophy is usually the department where ethics is taught and researched actively as a field, a person who tries to figure out where to post a question on ethics would normally be in good hands when going to philosophy.SE.
A person who has a very specific, field related problem, will look for the specific sites anyway.
So I've been told that the question occurred why ethics.stackexchange.com is not an alias of philosophy.stackexchange.com and that an additional the idea was philosophy as a hit if "ethics" is typed into the hamburger menu.
What does the community think? As I am a moderator on philosophy, I do not want to appear as if I think the other sites should not address ethics. They surely have to and the ethics of e.g. workspace and academia ethics are quite peculiar at times and need a specialist to answer. I am basically asking this on behalf of a user who genuinely had this question and raised it in chat.