It’s because more and more platforms (especially ones primarily used by younger people) are more likely to reduce the reach of their content when it has swear words in it. So many sites now push content to people or push content higher on search lists based on various factors. Content can be kept back even if it isn’t outright removed. So while it may be annoying to see people say stuff like “unalive” instead of “kill”, it’s entirely understandable.