But there are still plenty of casual contexts where one can use traditional curse words, and they will still have an impact. Making people think less of you is

But there are still plenty of casual contexts where one can use traditional curse words, and they will still have an impact. Making people think less of you is not the main dynamic of curse words (and they don't have a monopoly on that either!). Rather cursing is about openly transgressing social mores to display some combination of exceptional emotion plus (not being beholden to) social status. It's basically saying "I'm going to reject this thing you care about." So unless those words stop being routinely used for ignorant personal attacks, I don't see how swearing with racial slurs could become trendy for anybody but racists rejecting the idea that racism continues to be a problem. A decade ago I had more of an idealist post-racist outlook and could have believed that in a few more decades we'd be at the point where these words would have lost their deeply personal punch, with their only lingering effect being to cause pearl clutching (and who doesn't want to needle pearl clutchers?). But at this point that looks to be a pipe dream. Which is why I say it's a similar dynamic of words being off limits, but it's not actually the same. Some social mores have fundamental merit, believe it or not.