I'll share my conclusion. In many circles, the Left is accustomed to being able to proselytize their ideology while silencing Unbelievers. LW has a rare density of Libertarian leaning people, who generally aren't the types to sit silently and assent. Failing to ideologically bully, the Left resorted to pressure to just not talk about politics, which achieves the main goal of silencing the Unbelievers.

According to LW census liberals and social democrats make up about two thirds of the whole population. If anything, the fact that talk about politics is discouraged here is good for ideological minorities, such as conservatives, communists or neoreactionaries, because there are plenty interesting LW topics that are unrelated to politics. A few years ago people understood that.

How about instead we criticize each other's ideas if we want, and don't criticize them if we don't?

Discussing specific ideas one by one is different from discussing vague blobs of ideas that have a lot of connotations. The first one is much more productive than the second, because in the second case people tend to constantly move the goalposts and usė motte and bailey tactics. Discussion of specific mechanisms how elections may lead to outcomes that are contrary to the interest of population is different than discussing a vague blob of ideas that contain people as different as Moldbug's techno-commercialists and religious traditionalists who have basically nothing in common. For any neorectionary proposal there is another idea that is almost an opposite. You can't discuss it unless you specify exactly which ideas you are discussing. That is what tabooing the word "neoreaction" means. Discuss ideas that are specific and concrete, ideas that have empirical content, not some kind of vague symbols.