That's what's happening: bad ideas are being defeated. But if those bad ideas are still near and dear to you even while society moves on, it feels bad.
Not everyone has to be persuaded. Some will have to be left behind.
I think part of the issue is the tactics. The original post was pointing out that the way that bad ideas are being defeated is through force, not through reason. If the law says "Be happy or else" everyone is "happy". The problem being pointed out is that SV is becoming a place where you must believe the right things or else. The or else part is what makes it McCarthyistic.
Many people continue to be treated worse today. But those who are accustomed to dominance cannot tolerate even a single setback without screaming bloody murder. Their endurance is paltry compared to that of the historically oppressed, and their empathy and perspective even more lacking.