Should we say “sustainably sourced” instead of “ethical?”

Here’s a conversation topic I see going around the oddities communities: “ We don’t say ‘ethical’ anymore because ethics varies from person to person. Just say ‘sustainably sourced’ instead.” To me, this just trades one problem for another. Imagine if I tried to sell you a skull, and you asked if the product was ethical. Understandably, I might say “everyone’s ethics are different, so I can’t answer that with a ‘yes’ or ‘no.’” What I should say, IMO, is what I know about the skull as it relates