If the population of LW were to turn its eye to politics (more, that is, than it already has), I'm not at all sure that you'd get less social justice activism afterwards -- and I say this as someone that's no great fan of the social justice movement in its modern form.
i'm was kind of under the impression that (prior to reactionary influx) most LW just thought social justice issues were obviously true, not worth talking about, and that there are plenty of less intelligent people who are more than happy to fight that battle. You wouldn't expect LW to argue about religion either, for the same reason. Social justice was criticized because it was boring and obvious to agree with it...and that opened the door to reactionary thought to become popular.
After the reactionary influx, we started talking about it more, because now there was a group who intelligently disagreed in our midst.
It may help in this context to distiniguish generic left-wing/progressive views which may fall into the category you are talking about and "social justice" which has a host of other connotations.
Through LessWrong, I've discovered the no-reactionary movement. Servery says that there are some of you here.
I'm curious, what lead you to accept the basic premises of the movement? What is the story of your personal "conversion"? Was there some particular insight or information that was important in convincing you? Was it something that just "clicked" for you or that you had always felt in a vague way? Were any of you "raised in it"?
Feel free to forward my questions to others or direct me towards a better forum for asking this.
I hope that this is in no way demeaning or insulting. I'm genuinely curious and my questioning is value free. If you point me towards compelling evidence of the neo-reactionary premise, I'll update on it.