It would seem you’ve conflated accepting sci-fi possibilities with a ultra liberal version of sci-fi. I’d posit despite Reddit’s biases and those of your admittedly liberal bubble, that there are many sci-fi visions of the future that don’t include a weird spiral into a society that says anything and everything is acceptable, nor are dystopian in their scarcity. What you really seem to be asking is how crazy / bad can things be before you reject them. I think your premise is flawed, in that not all change can or should be accepted. We can do better.