I think you're arguing against something that nobody has suggested. Eliezer has suggested a specific topic that he thinks is worth making off-limits on LW (maybe even temporarily), since it seems to bring us all off-track, just like he did with AI and the Singularity when LW started. He did not suggest that this should happen automatically every time someone thinks something is objectionable.

Separate from this was the idea that if someone mentions to you that you're being inconsiderate and suggests an alternate phrasing that does not distort your meaning, it might be a good idea to fix it. In short, "don't be a jerk".