From a UX/UI point of view, if something can be confusing to the user at times, then it shouldn’t be added, even as a feature people can turn on and off.
Does having it make it confusing? No. The reply is, well, a reply to a user, so it’s a good indicator, even if there’s more clutter. But we are already adding “clutter” to other replies, so it’s not another indicator that will make it feel cluttered, and it’s always a great way to avoid ambiguity, like the example I shared.