Sarcasm was developed in spoken word. If you are using the written word, it needs to be painfully obvious if you want the meaning to come across. But due to Poe's Law, that's becoming harder and harder these days. Especially in the political and human rights discussion.

No one is forcing you to use /s. But shitting on people using it because you don't think it's "pure" is asinine and also abelism.